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Causes of Cat Aggressive Behavior

Updated on February 5, 2016

There may be several causes of cat aggression

Narrow down why your cat may have turned out aggressive

The most obvious physical causes of aggression in cats is pain. Having worked at an animal hospital, I have seen my fair share of aggressive cats. In many cases, the cats proved to be far more aggressive and damaging than dogs. As a veterinary assistant, you surely do not want to deal with a very angry cat. Fortunately, special restraint techniques make treatment possible, sometimes requiring the help of others.

When it comes to aggression issues with cats, underlying physical or behavioral problems must be addressed. There can be various causes and therefore, identifying the triggering factors may help ease and/or solve the aggressive issues all together.



Physical causes of Cat Aggression

Before assuming your cat is just plain mean or aggressive because of some behavioral problem, it is important to rule out some medical condition. If your cat is usually friendly and now out of the blue is hissing, does not want to be picked up and this is totally out of character, assume a painful condition or some other underlying physical problem known for causing aggressive displays.

  • A non visible wound

Anytime your cat appears to be aggressive for no reason, a veterinarian visit is a must. Somewhere must be hurting and the cat may scratch or bite if handled improperly. The source of pain therefore must be investigated. Many times there is an open sore or an abscess not visible under the fur. My cat one day was hissing and growling and we had no clue, only a day later we noticed one of her nails had grown so long it was embedding in her paw pad!

  • Chronic conditions

Chronic conditions such as arthritis, dental disease or poor eyesight may cause cats to become grumpy and unwilling to be touched. Have a veterinarian screen your cat for any underlying health disorders. While cats tend to hide their pain because this makes them vulnerable, when there is pain, the cat is likely to change attitude.

  • Hyperthyroidism

Cats affected by this disorder may exhibit behavior changes along with increased drinking, increased urination, weight loss, vomiting and diarrhea. Behavior changes may consist of aggression, nervousness, and hyperactivity. Worth running a thyroid panel if your cat has had recent behavioral changes and you cannot find a reasonable culprit.

  • Rippling skin disorder (Hyperesthesia)

This is a condition that is not very known. However, many cats seem to be affected. Affected cats will display an odd behavior: their skin on their back will twitch and the cat will run as if bothered by something. The cat may then turn around and try to bite or scratch its back. The cat's eyes may be dilated and the cat may vocalize disturbed. Upon petting these affected cats the skin on their back may twitch and they may turn aggressive.

  • Rabies

If you encounter a stray cat that is aggressive ,stay away as it may have rabies. Consider rabies as well in unvaccinated cats that appear aggressive and that are kept outdoors in contact with wildlife. Should you encounter an aggressive stray cat, call animal control. They are best equipped to restrain such cats and have them evaluated for Rabies. While rabies is rare, it is such a serious disease that you must rule it out if an unvaccinated stray cat bites you or scratches you.

Psychological Causes of Aggression in Cats

Once you have rules out medical causes for aggression and your vet gave your cat a good bill of health, it us time to consider behavioral problems. Important questions to ask are: any recent changes? have you moved? new partner? new cat in the home? a new baby? new furniture? new routine? new construction workers across the road? Cats are creatures of habit and anything that changes their routine makes them stressed.

  • Redirected Aggression

This is a form of aggression caused by an overstimulated cat. This may occur when a cat sees out from a window another animal such as another cat or a dog and then suddenly attacks his owner or another pet. Such cats may be difficult to treat, many times requiring covering all windows and doors or placing the cat in a dark room to calm down.

  • Unfamiliar scent aggression

Many times right after taking a cat to the animal hospital, owners would call us because their other cat at home would start attacking the sick cat. This is a common instance, and it is due to the fact that the cat left at home is disturbed by the other cat's smell. Many times this was solved by bringing both cats at the hospital when one was sick or by passing a scented towel on both cats so they both smelled the same.

  • Rough playing aggression

Many times young cats and kittens may be thought to be aggressive while all they are doing is playing rough. A cat or kitten that attacks the owner's ankles is simply acting out of prey drive. In other words the owner's feet or ankles are thought to be prey and so the cat chases and scratches. Most cats seem to outgrow from this form of play aggression, however, a good remedy is to toss a toy at the cat upon stalking you in order to redirect his attention.


  • Intolerance to being pet aggression

Some cats will tolerate being pet for a few minutes and then they will lash out when they get tired. In this case, it is very important to anticipate his behavior by reading physical cues suggesting he is about to lash out.Before reaching his intolerance point immediately put the cat down and give a treat. Repeat by making the petting sessions longer.

  • New mom aggression

Your sweet cat may turn into a lion once she has hada litter of kittens. Most new mom's aggression regresses as the kittens age. Try to keep her quiet and avoid disturbances. This is just a natural instinct to protect her babies.


  • New cat aggression

You just adopted a new cat and your older cat will not tolerate the new arrival. Threatening growling and hissing takes place. This form of aggression usually regresses with time. Always make introductions slow and do not force the two to get along. Sooner than later with no pressure, the two will begin to accept each other.


As seen there may be a multitude of causes for aggression in cats. The best course of action is to have all medical causes ruled out first and then deal with the behavioral issues.

T-TOUCH for Calming Cats

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      Janet 2 weeks ago

      My 1 yr cat used to love playing with my 3yr now she just hiss's not just at her but everyone else in side the house when they get close to her and hates everyone that walks thru our door. HELP. I don't know why her attitude changed.

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      Julia 4 weeks ago

      My 1yr has just started hissing, isolating herself An going number 2 out of her box An has gained weight An only once to be around my son

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      shanzydagg@mail.com 5 weeks ago

      Why is my 3 year old cat growling and hissing every time she plays with this certain toy of hers

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      brianna 5 weeks ago

      i have 6 cats my one cat hannah attacks my other cat all the time even when they are doing nothing she has been doing that sunce i first got her.

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      eddie 5 weeks ago

      We recently brought home our new born from the hospital and ever since our cat has been very aggressive. He will walk up to the baby or my fiance and just hiss at them. he doesnt do this to me. any idea what the cause of this sudden behavior could be?

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      Debbie neophytou 2 months ago

      I have 3 house cats 2 are 4 years old the younger one is around a year old a stray i rescued in january and took her to vets to be done,they were no problems with the older two cats now all of a sudden both the older cats attack the youger onei have no idea why..all 3 cats have been done,please help

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      Kimothy 2 months ago

      And I now have the pleasure of adding that we just went upstairs to go to bed and noticed that the older cat peed in it - which is something that she's never done before.

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      Kimothy 2 months ago

      Hi, we took in a female cat a little over a year ago. She's been fixed and has had all her shots and has been a very friendly/lovable cat. About six months after we got her, we adopted another kitten that was only about four weeks old (had to be bottle fed at first). The older cats was very stand off-ish for the first couple weeks but as time went on, they became very close and were always together. However, our younger kitten managed to get herself pregnant before we though she was old enough to be fixed and had four little kittens two weeks ago. Our older cat has not shown any acknowledgment of the kittens but it very aggressive towards the new mother. In fact, she barely even acknowledges my husband and I. Is there something we should be doing to help our older cat relax and once again accept her adopted sister?

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      Adrienne Janet Farricelli 3 months ago from USA

      Kandice, can you take your cat to the vet? Being in the cage already should make it easier. This would be a good start so to exclude medical problems and then you may need to consult with a cat behavior specialist if no medical conditions are found.

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      Kandice dietz 3 months ago

      My cat flipped out on me and my cats.. ate my finger off! She's been in a cage all night, this morning she is still growling still still aggressive.. I'm scared to death and so are my other cats to let her out! What should I do

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      Ash 5 months ago

      My husband and I recently took in a cat. We have a cat already and she was curious about the new cat. However, this new cat hisses and growls anytime we are anywhere near it and if we get close she either runs away while still growling and hissing or tries to attack us physically. With our other cat, she isn't friendly at all. Even though our other cat is trying to just get to know the new cat and try to be friendly and feel her out,

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      Concerned cat parent !!! 5 months ago

      Hi am seriously concerned for my cat I let him hmgo outside the other day and because he's too scared to leave my property I thought he'd be fine and he was till the other day something spooked him and he came running inside fluffed up eyes wide and meowing I went to comfort him and I usually pet his head and pat his butt but when I part his but he made a sort of howling noise hissed and scratched me badly afterward he became very defensive and every time I came near him he would howl and I knew to satay away after a full day of avoiding him the next day he was back to normal but when he ran out when I went to go get something he was out there less then a minute and became like a wild animal again I trapped him in my shed with food and water but I don't know what to do with him I'm scared if he accidentally escapes again he become aggressive again what is wrong with him ?

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      melissa kimplin 5 months ago

      I have a older cat and a one year old monster lol . He has to be separated from my female both are fixed . He hunts her down and then will pounce on her which it does hurt her she has a bad back and has lived through a lot . So I do on occasion when it is quiet let them both out at the same time . Ebony my older kitty will be minding her business and Sam the terror goes on his hunt . He will do good for about a hour then you see the switch in his head go off and its water bottle out just in case . what can I do

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      Ouarda Filali 7 months ago

      I have two cats that are around 6-7 months old, I went and got them vaccinated with their booster shot, but I added a leukemia shot. Day after They would hiss and meow whenever I try to examine them.... any help?

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      bunny ohannon 7 months ago

      We found a kitten (8weeks old maybe) in our backyard. It was very hungry and dursty we feed and gave water, also washed him. That was about 18month ago. Needless to say, he moved in. We had him neutered, chipped and got all the shots. We love the cat, he goes out between 10 pm and 12. He runs around all night comes home at 6 am, we're we let him in and feed him, he sleeps all day. Recentlyrics he attack my husband feet and caves until he draws blood.he don't like to be petted to much. If we don't let him out he gets wild, he runs allover the place meows none stop. What can we do my husband is about ready to get rid of him .

      ,

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      Adrienne Janet Farricelli 9 months ago from USA

      Hi Pamela, you will need to gain his trust. One if the best ways is through not forcing interactions as of yet and letting him know that you are the one feeding him and you won't harm him. Move slowly, try to avoid making loud noises, talk to him in a calm voice. He'll figure things out eventually! good luck!

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      Pamela 9 months ago

      I just started fostering my neighbors cat because my neighbor is having to move and can't take him with her. He is a year old fixed. He is a very sweet cat, but when he came to my house he has been hissing, growling, and hiding and batting. I know that it is probably just the fact that he is in new surroundings and is terrified. But I want him to understand he is safe.

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      Adrienne Janet Farricelli 9 months ago from USA

      Sounds like a stressed cat. You can try Feliway and using a counterconditioning program where you use tasty kitty treats (try different kinds and find the one that she responds to the best, maybe even pieces of tuna or dried fish) to create positive associations with the cleaning. Use gloves and long sleeves to protect yourself, but be very careful! Cat bites and scratches can become easily infected. When your cat is sleeping on the couch, sit besides her, and you can try to show cotton ball and give treat, show it again, treat, then progress slowly to moving cotton ball near face/treat cotton ball near face/treat. Try not to hold her, this may make her more distrustful. Try to work on making the cleaning as pleasant as possible so that she doesn't need restraint. Lots of time and work, I know.

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      CameoFace 9 months ago

      I adopted a "breeder Persian", 4 yrs, had 5 litters. Had her 3 weeks. All of a sudden she won't let me groom her at all. Refuses to let me hold her and wipe her face with cotton balls. She must be cleaned each day (nose/eyes). She aggressively refuses to allow me to hold her and has scratched me violently twice. She is sweet and gentle otherwise. Any advise? I don't think she is socialized much.

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      Saweela 11 months ago

      Hello I have a question about my seven month old brother kittens. Both of them were very friendly but today I let both my kittens go out and enjoy themselves, one of them came early (which one is little in size) and second one came little late(the elder one. He was born before the little one). After coming home, the little one suddenly started to bite and attack him. The elder kitten didn't fight back instead he tried to run away from him. I separate the little one many times but after some time he does the same thing over and over again. My brother said to me that the little one wants to play with him but the elder brother don't feel like playing. Just like when elder one used to attack him and the little one didn't like it. I asked my brother to take the elder brother to his room since I will take care of the little one. But at 4 AM he came to my room again and the little one started to attack him again. I managed to make the little one stop fighting and was able to put both of them together in bed. It's 5 AM and their sleeping peacefully again like they always did right next to each other.. But still why is he attacking? If you can help me please.

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      Cindyw61 12 months ago

      We have 2 neutered male cats that we have had for 5 years. They are not litter mates but when we adopted them they were in the same cage. They have gotten along great all the years that we have had them. About 2 months ago a neighbors cat that is an indoor/outdoor cat wanders on our deck while my cats and I were out there. We have a gate at the top of the steps and the other cat was nose to nose with one of ours and they were both VERY upset. So, I did the natural thing and picked up both of our cats and put them inside right away. Then a second later one of them started to chase the other and the one being chased ran under my bed, and the sound was horrible with the hissing, growling and horrible screeches! So, I seperated them, for a day or so. Let them get used to each other again thru a crack in the door. Then they were friends again, till the cat came back (I have talked to the owner about this situation). Then it happened all over again. I did the same thing, then they were friends again. The cat came back for the 3rd time and it happened again but this time I put a different cat in solitary for a couple days, the one that was so aggitated and hissing. I finally forced the issue for them to become friends again, and it worked. The next time it happened the other cat was not involved outside that I know of. Something got triggered, a memory or something and they were on the outs yet again. The cat that is doing all the hissing is also the one that keeps trying to hide. The other cat doesn't do anything, just looks at the one that is upset. He does chase him a little bit or he seems like he is trying to maybe corner him, but not all of the time. Today I let them out on my deck, they love it out here when it's nice out. The growling hissing one soon settled down and they were friends again. The minute I let them in.........the growling hissing cat was again growling and hissing at the other one that he had just been grooming his face! What in the world is going on? It's like a switch went on when they went inside and he became mean again! Currently, they are out on the deck, curled up in a chair with each other! Ugh! I give up, as to what is going on here. I am desperate to find a solution. :-(

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      camillab 12 months ago

      Hello

      We have a 2 year old cat we were given as a present. The original owner told us that he had had a difficult start in life as he had been abandoned by his mother. He has always been somewhat anxious and gets startled quite easily. He doesn't like strangers but we've learned to manage that. What is difficult is that he can suddenly attack one of us in the family (usually me - the only female) for no apparent reason or when I make a sudden noise. The bites have been quite severe and I've been warned by my doctor that cat bites can be really serious and that we should consider getting rid of him. The thing is our oldest son (14) is very attached to him and would be incredibly sad if he was gone. On the other hand our younger son (11) is a bit scared of him and afraid to do the things he would do if the cat were not there. We don't know what to do - any advice?

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      Adrienne Janet Farricelli 12 months ago from USA

      Andrea, perhaps first start with a vet visit for both cats, just to make sure there is nothing physical going on.

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      Adrienne Janet Farricelli 12 months ago from USA

      Haley, be careful holding your other cat when your cats are angry with each other as you may get a re-directed scratch or bite,I would use gloves just to be safe. If your other cat has seizures, these could have scared your other cat causing stress and a reason to attack. You can try tossing some treats to your other cat every time you hold the other cat. This may teach that "good things happens"when she holds the cat.

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      Adrienne Janet Farricelli 12 months ago from USA

      I feel for you kkramsey as my cat went through the same thing some years back. She was checked by the vet and all was fine, but she still had these episodes. I tried Feliway, it helped a bit, but it didn't make them go away. For a while I was convinced it was the carpet making her nervous as she sometimes got shocked by static, but I really never knew what was the trigger. All I knew is that she very stressed and chasing her away or cornering her, seemed to make it worse. If I still had my cat today, I would have tried using high-value treats. In your case, you can try bending over very slightly and letting a few treats fall to the ground so that she thinks bending over isn't threatening, gradually bend more and more letting more treats fall down. Be cautious though, I know many people getting scratched by their stressed kitties. I hope this helps, if your kitty is too stressed, she may not want to eat though, or you may have to try something extra yummy like dried fish or liver. Good luck!

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      john 13 months ago

      my fiancé and I have had 2 kittens they are both about 11 weeks old and we have had them since they have been weined... they have been fine up until yesterday and one cat is just not having it while the other cat tries to play with her... they are sisters and its honestly kinda sad cuz the cat that wants to play just stares her down with a sad look almost... idk whats going on with her but she has just been a royal bitch to her sister... shes fine if we pick her up and stuff we can pet her but when we go to put her down and her sister decides she wants to play she gets pissy and scratches at her and hisses and growls... help me please!

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      sam 13 months ago

      How do I stop my cat from biting me and attacking me cause he's bin doin it since he was a kitten from when I got him and he kps attacking my other cat alot aswell

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      Erzsebet Bathory 13 months ago

      I have adopted a kitten that is approx. 4-5 months old. He is very, very aggressive. There isn't any one category of aggression that fits him. He growls at me whenever I look at him and talk to him, he is aggressive when playing, like he is really attacking the toy, he can't stand to be petted, or even touched. He growls constantly. He attacks my legs when I walk by him. I notice that he is less aggressive and threatening (but not by a whole lot) with males. This kitten came from a household that had a toddler and I'm wondering if he was tortured by the child. There seems to be no medical reason why he is this way. It's as if maybe he doesn't know how to make any other sounds other than growling, which I'm sure is not true. I said this to give you an idea that he growls constantly when I am around him, and never displays any other kind of behavior. He never meows or purrs, or displays any kind of positive behavior. He eats just fine, and his litterbox habits are fine. Please help!!!

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      Andrea 14 months ago

      I have a brother and sister cat that have been together for 8 years and have been best friends that love eachother. Out of the blue the sister cat has become very aggressive to the brother and is hissing and attacking him. It scares me because I've never seen them be like this and I don't want him to get hurt. It's just out of the blue. I don't know what to do and it is stressful for the boy because he doesn't understand.

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      haley 14 months ago

      my cat binxy (who we have had for 8 years) has all of a sudden be acting very aggressive to our other cat Christopher (who we have had for 3 years) they were aggressive to each other at first, this we knew! but after awhile it changed into play fighting now almost 3 years since we got him my cat binxy has gotten so aggressive to the point where if I hold the other cat he will growl at me. we don't know what to do, Christopher just went to the vet because of seizures. we got it all straightened out and he's better but with binxy attacking him it makes him stressed and worn out. Might I also add that binxy had always shared a house with at least one other cat...and he was never this aggressive he also has had all his shots (including rabies) i hate to have to do something to make him calm again but he's just not the binxy I had 8 years ago....

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      kkramsey 14 months ago

      A couple years ago I took my cat to the vet just for a vaccination shot. She had a very bad experience while there-was growling and hissing at everyone and everything. It took over a month for her to calm down get back to her normal disposition. Since then, every now and then something will trigger her and she will revert back to the hissing and growling-really ferocious and threatening. I've been so afraid of her that I have to scare her out of my bedroom and lock her out just so I can get some peace and have some time where I'm not terrified she's going to lunge and attack me. It's been quite a while since her last episode and I thought enough time had passed that it wouldn't happen again. But last night something triggered her and I had to lock her out of the room again. In the middle of the night she was clawing at the door and meowing so I attempted to let her back in. When she walked in the room, I pet her a little and she walked around nervous like, meowing, but when she jumped on the bed, she immediately began growling and hissing at me again so I had to chase her back out of the room. This morning, as soon as she saw me she began growling and hissing at me again. (Plus she had left pieces of poop all down the stairs for me.) Any ideas on what can be causing this behavior? I have noticed that if I lean over her (i.e., if I'm reaching for something), that can trigger it. Most importantly, what do I do when she's exhibiting this behavior? I'm scared of her and don't know what to do.

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      Adrienne Janet Farricelli 15 months ago from USA

      Sounds like a stressed cat and redirects towards you or anybody nearby. I would try to get him desensitized and counter conditioned to the noise of crying as it seems to be a trigger. Every time the baby cries from a distance, feed your cat something your cat loves, like a bit of sardines, dried fish or some other smelly treat your cat loves. When the baby stops crying stop feeding the treat. The purpose is to get your cat to associate crying with the treats. However, problems may be seen further down the road, when baby grows and starts crawling, then your cat may need the same procedure done while the baby crawls at a safe distance behind a baby gate if needed. Always keep an eye on baby and cat and never keep them alone unsupervised.

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      Adrienne Janet Farricelli 15 months ago from USA

      Rabies is transmitted through a bite with a wild animal, so the most important question is: has your cat been in contact with any animals that could have bitten or wounded her?Any contact with the saliva of some animal? Is your cat indoor only? Most vets won't vaccinate when a cat is pregnant. Does the aggression happen though only in the presence of the kittens? If so, you may want to keep the away from her and see if the behavior persists in their absence. There are chances that as whelping nears, she wants her kittens to be safe and is looking for a whelping spot with no other cats or kittens interfering. Adolescent cats are already big so she may see them as posing a danger to her litter.

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      Kim 15 months ago

      I had a baby 3 months ago and our make 6 year old cat has become aggressive. He always has nipped when any part of his body was pet except his head. He has been rubbing against my feet while I am sitting and then turning and trying to bite me while I hold the baby. He has attacked my mother in law when she was alone with the baby ( even when she was not holding the baby) and continuously stalks me or anyone when they hold the baby while she cries. He has circled the baby when she has been on the floor crying. He also attacks the other cat during cries or if she comes near me and the baby. He can still be friendly and loving, it's just starting to concern me with a baby. He safety has to come first. I've tried a calm collar and it didn't work. What can I do? He is loved and getting him a new home is the last resort.

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      Jess 16 months ago

      A lovely cat Catalina moved into our home as we have a hole under our house.. She has lived all over our neighborhood and she is semi wild. She joined our family and I realized she was pregnant.. Her behavior was great.. She had the kittens and we kept two then fixed them at three months.. Catalina was also scheduled to be spayed but I realized she was pregnant again so didn't take her in. Now she is near giving birth, only comes in to eat, and is extremely aggressive to the adolescent kittens. I want her to have safe haven and to get her vaccinated then spayed after the birth. Can she be vaccinated while pregnant and other than the calming wraps do you have any advice? I do fear she's rabid but aggression is the only exhibited symptom and no rabies have been found in my area of late. Thanks for your great work.

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      Adrienne Janet Farricelli 16 months ago from USA

      It can take some time. Some days, some weeks. I would get a Feliway diffuser for the time being.

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      Susan 16 months ago

      Cat just got shaved,he is male. Female cat is being aggressive... how long she going to be like this?

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      Adrienne Janet Farricelli 16 months ago from USA

      I don't think cats would feel "jealousy" that way, perhaps may just want to join the other cat.

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      CosmoChick 17 months ago

      Hi there, it's amazing that you still answer comments after all this time, thank you! Quick question. I have 2 Siberian cats, brothers, grew up together, very good natured. One is super agile and jumps great heights, the other not as brave. I've stopped letting them both out on the balcony because the agile one jumps straight for the railing and gives me a heart attack each time he pretends to be walking a tight rope (9th floor). However, the other day, I let the other cat out for a while, the agile cat was sleeping and didn't notice.

      If I keep letting one cat out and not the other, will the one that stays in get jealous, especially if he sees us hanging out on the balcony?

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      Sarah 17 months ago

      My dog and cat have always gotten along she use to sleep with him and rub against him until 3 days ago. We had a rat in the house and the dog went nuts trying to catch it while he was chasing it she ran after him and attacked him to the point that she made him bleed. She has had a litter of kittens 3 months ago but even after that showed no signs of aggression toward the dog she would even leave the kittens to lay with him. I can't get her to stop and don't know what to do!

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      Adrienne Janet Farricelli 18 months ago from USA

      Could be she feels pain there (doesn't hurt to check with the vet if she was OK with that before), or doesn't like to be picked up. Most likely the latter if she was feral and never got used to being picked up. Look up some videos on youtube on how to pick up a cat, so that legs aren't dangling, also would not keep near the face for safety...but prior to that maybe get cat used to it gradually, giving tasty tidbits of food every time you touch her, then move up to pick her up for a second feed treat, then put down, then pick up more etc. Be very careful though you can get really hurt if she aims for the face! Maybe place some SOFTPAWS on her nails to prevent getting scratched.

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      Anne-Marie 18 months ago

      I rescued a feral female cat - she is extremely sweet and craves attention. However, if I pick her up below the front paws (with her facing me and lower part of her body dangling), she would lash out to scratch me in the face - very aggressive. Does she feel threatened?

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      Kelly 18 months ago

      My male cat is 5 yrs old and a house cat. Hes been neutered 4 yrs ago. He has to be the sopiest calm cat going but just recently he's attacked a couple of friends of mine that have been visiting for wks at a time. He is all over them rubbing up against them n then he hisses n attacks them. They don't have pets. When I've stepped in he's gone to attack me and very badly. He makes this weird noise at the same time. I've been in tears cause this isn't my cat at all and don't like him being like this. Hes a very big cat and can jump higher than my head which I've had to protect with a pillow before when he's attacked. Can anyone help in regards to what I can do to get my loving placid cat back to normal? ?

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      Adrienne Janet Farricelli 2 years ago from USA

      Sounds like stress, also a medical condition can cause behaviors as such. Good to see the vet to rule medical conditions out and could be also her kittens are all grown up now and she doesn't want them to nurse anymore.

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      Cinthia 2 years ago

      I have a female cat named minnie she had a litter of kittens 4 months ago last month we took a trip to iowa which is 18hrs away from home she was in a carrier with my male cat and my kittens were in a carrier of their n she was done feeding them and they were eating on their own full time she handled the trip down stayed at my parens house for a month and then we brought her and 3 of her kittens home in the same carrier alone when she got out she was fine and a few days after that she acts weird by not being on the porch where she always has been wont come around her kittens or any of us and she hisses hits and growls at everyone including her kittens what is wrong with her please help?!?!

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      Adrienne Janet Farricelli 2 years ago from USA

      The good thing is that they're all very young. They'll need to learn to communicate with each other. The hyper kitty will need to learn when the younger kitties had enough,and the calmer kitties will need to learn effective ways to tell the hyper kitty they had enough. All this should be done without through body language and vocalizations without hurting each other. It takes time for new kitties to adjust to each other and being in a new home. The ones that seem calm, may just be a bit stressed and may open up as they get used to their new homes. I really never saw totally calm kitties. As with dogs, they may through the honeymoon period, where they are a bit shy and reserved, then once they're comfortable they'll start engaging in play. It hard though,to predict how things may turn out in the long run. Your older hyper kitten may have missed out learning how to communicate if she was a singleton or didn't grow up with other kitties, but hopefully being young she can catch up and they can all learn from each other :)

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      Julie 2 years ago

      Hi! I need help really badly. I've recently gotten a 10 week old kitten. Shes been so lonely without other cats so today i got 2 kittens (they had to be sold as a pair) who are 9 weeks old. The new ones are extremly docile and very lazy, while my old kitten is extremly hyper and playful. So far the new ones do not seem to like the kitten. Is there any chance that with two completely different personalities the kittens will get along? I'm just really worried that they will not and i have spent all this money for nothing.

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      Adrienne Janet Farricelli 2 years ago from USA

      It could be she feels safe in her home and doesn't like any intrusions. Like dogs, cats can be territorial too.

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      laura 2 years ago

      My cat hates when i come home smelling like other cats. She hisses and tries to bite me. Is it just because she does not like other cats?

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      Adrienne Janet Farricelli 2 years ago from USA

      Sounds really a mystery! Since in one attack you were sleeping, I wonder if you were perhaps twitching or snoring and your cat aggressed because felt it was odd? Do you suffer from any sleep disorders like sleep apnea? When you were knitting, can it be your cat wasn't attacking you intently but was behind the couch after a ball of yarn? can it be you were about to fall asleep? or can it be he woke up from a bad dream? did any of his behaviors match signs of feline-hyperesthesia?I hope these were isolated events and that whatever triggered these attacks in those 2 nights is gone.

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      plz help reply 2 years ago

      They saw the vet only 2 wks prior to the attacks (worming tablets n check up) and were given a clean bill of health aswell. at the time my female attacked the male was asleep in my bedroom and did not wake or notice any problem until i got dressed to go to hospital. (i was asleep on the couch) and when my male attacked, the female was locked up because of her attack. (Attacks were almost a wk apart) he was cleaning his Head and i checked him after for any fleas cuts bumps anything and nothing i could find. Both attacks happened while it was quiet and fans, tv lights everything were turned off. We have tiles all thru the house no carpet and leather or wood funiture. and both cats are still fine with eachother they are still playing, eating and sleeping together they have never shown any problems towards eachother. They do not show me any issues they still want cuddles and follow me around and are very loving happy cats. Its only been these 2 night where they have done this (from my view) out of the blue. I have been observing them and they are acting normal like nothing has happened

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      Adrienne Janet Farricelli 2 years ago from USA

      This sounds like a mystery, yet, there has to be a trigger. Since it's affecting both cats, most likely there something that's stressing them out. Even if you do not notice anything, think if you ever left them alone in the house or didn't watch them, can it it be something scary happened in your absence? Since your cat attacked you while you were sleeping, perhaps something scary happened just seconds before? Could there be static in the carpet, upholstery? Any animals they may see from windows? Any stressful events like loud noises, planes flying low? Any air blowing from a fan or somewhere else? Could it be your female attacked you in your sleep and was reacting from your male perhaps jumping up as he did on the couch after licking? Does the skin on their backs ever moved as if itchy and they get irritated from it? Even though they saw the vet regularly, things may change suddenly, so doesn't hurt to give them the benefit of doubt that something medical may be going on, especially if you tell your vet about these behavior changes, he may do a visit more targeted towards medical causes for aggression. It could be one cat has a problem and the other is stressed out from it and is reacting too. What area of his body was the male cat licking seconds before he jumped up? Observe them very carefully, but please be very careful I am so sorry to hear you got hurt so badly!

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      Adrienne Janet Farricelli 2 years ago from USA

      It's hard to say without seeing the behavior, the context and the accompanying body language. Since you suspect this particular cat, I would suggest not to leave cat and toddler alone; the cat can even scratch an eye! It could be a case of redirected aggression, from getting aroused, stress of even a medical condition. A vet visit may be a good place to start, and afterward, you may want to consult with a behavior professional such as a Certified Applied Animal Behaviorist or veterinary behaviorist.

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      Meghan M. 2 years ago

      Hello, almost a year ago my husband and In took in a beautiful rescue cat. Unbeknownst to us, she was pregnant, and after little over a month gave birth to 3 of the most spoiled, loving kittens anyone could ask for. We kept them all, and I love each and every one of them, and they are all so unique. Well, one of the two female kittens, Lazy Bones, or LB for short, is generally the calmest, most docile of the three kittens, out of nowhere scratched my 15 month old on the nose today. Yesterday scratches appeared all up and down my daughter's legs. She did not cry, and there were a couple of them in the room, so I couldn't be sure which one did it, but LB was present during that time as well, so now I'm pretty positive of the culprit. LB is 8 months old now, and aside from the two scratching episodes, she has not displayed any other signs of aggression, and my daughter doesn't appear to be scared of her, not even a little bit. What could be the cause of this scratching? I know my little girl wasn't being rough with her, she wasn't playing with her at all. I love this little kitten, and I don't want to give her up, especially if this is a temporary, fixable thing. Please help! I'm desperate for both my daughter, and LB.

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      Adrienne Janet Farricelli 2 years ago from USA

      Have him see the vet to make sure there's nothing wrong with me, he could be in pain, especially if he's always been a love bug and now he's suddenly not.

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      adry 2 years ago

      My neutered male cat, all the sudden, started getting fat and over aggressive. Hes been neutered for a long time, and hes been the best cat in the world. Now he wont let me touch him barely at all and when I do he growls or runs.

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      Adrienne Janet Farricelli 3 years ago from USA

      When animals are stressed those stress hormones linger for some time. Let her stay quiet, try Feliway and limit her exposure to stress events. If interacting with you and your boyfriend further causes stress let her stay alone in a quiet room with food/water until she feels safe to come out.Also, consider having her see the vet if there are chances she may have gotten hurt somehow around the kids.

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      Leslie 3 years ago

      I have had my female cat for about 8 months, and she is 9 months old. She has lived with my boyfriend and I the entire time and has had normal cat behavior. Recently my 3 kids came to stay the weekend for the first time since have had the cat. The entire time they were here she was very aggressive. She would hiss and growl and swat at them. She even started being aggressive towards my boyfriend and I, which is very out of the norm for her. The children left her alone, and she still seemed to be very aggressive towards all of us. They left a few days ago and she hasn't returned to her normal self. She is still aggressive and seems to be angry. I really don't want to get rid of her, but we can't even touch her. I just don't understand what's wrong!

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      Adrienne Janet Farricelli 3 years ago from USA

      Any way you can put a baby gate or block off the area so he can no longer have access to the staircase? If it's only that area that triggers such behavior, the solution may be as easy as that. Did your previous home have a stairway? If not, it could be he is frightened by it and when you walk there it may seem odd to him seeing you so high and then he may feel threatened by how you move your legs in an odd fashion as you climb up and down.

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      Alexia 3 years ago

      Hello. I have my cat for a year now, since he was born and is a male. We haven't gotten him fixed yet and before he use to play kindly until we moved to a new house. Recently he claimed the staircase as his area and whenever we walk up and down the stairs he would pounce at our feet, but now something worse happened. My father had a friend over with a little girl and she peaked her head to the staircase and he just jumped and attacked her whole head that she had to get stitches. My dad is very insecure about him now and thinks my cat will just randomly attack any of the family member at anytime. Oh and recently he was introduced to catnip to try to calm him down. I don't know if it could be his hormones or just trying be dominant. My dad is refusing to get him checked out by a vet because of money issues and maybe give him away :(

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      Adrienne Janet Farricelli 3 years ago from USA

      Cats don't like changes,and it's evident that your other cat doesn't like the new hairdo, sure your cat is always the same, but from your other cat's perspective he looks different and even smells different since he was at the groomer. You can try Feliway, or feeding your cat tid bits of high value food every time the other cat is around.

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      Patty 3 years ago

      Hi I have 2 cats, they occasionally fight but nothing extremes until now, my older cat had long hair and we took him to get groomed and now since he's returned my other cat is hissing and growling at him when ever he is around. Last night the one that got groomed came in my room and he went nuts even started growling at me and hissing and even swiped at me with his paw, after a couple hours he calmed down and came to me and was loving again but anytime the other cat is around he starts up again I don't know what to do. We live in an apartment and they are both indoor cats.

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      Adrienne Janet Farricelli 3 years ago from USA

      I would start with getting a vet check done when behaviors like this start out of the blue.

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      Amanda B. 3 years ago

      I have two 5 year old male pure bred Himalayans from the same litter. They are both neutered and were adopted together by us at 12 weeks old. We have no other pets, and my two have never been outside except in a crate for vet trips. They have always gotten along well, and enjoyed chasing each other, rolling around (non-aggressive wrestling), grooming each other, etc. For the past week and a half, the more outgoing of the two has been yowling in short bursts, racing around the house like he's being chased, jumping up the walls like he's trying to do a skate board trick, and has chased/caught/wrestled his brother to the ground and bitten him, all very aggressively. When these incidents have occurred, the more passive cat has screamed and yowled until we separate them. Neither cat has ever hissed or bitten me, my spouse, or my 2 kids who were 5 and 8 (now 10 and 13) when we brought the cats home. None of it happens every day, but over say 11 days, it has happened maybe 5 times, always in the evening/night hours. Any ideas? It is concerning to say the least, and scary for the kids when they see it happen.

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      Amanda C 3 years ago

      Hello - Last night my cat that I have had for over 3 years must have gotten caught in a pastic shopping bag and drug it across the house and I think she got really spooked. I am her favoriate person - she never hisses at me, she sits on me all the time and now she is being really aggressive. I think she might even think it was her brother that scared her because he was right behind her and she now is hissing and growling at him constantly. Her pupils are dialted a lot and her fur is standing up a lot. She is acting really paranoid.

      I don't know what to do or if this stop because this just happened last night, but I am worried because she is my baby and now I am scared to pet her because she freaks out. She was sitting on me earlier sucking on a blanket and was a little better, but not anymore.

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      Adrienne Janet Farricelli 3 years ago from USA

      Sounds like rough play and zoomies from pent-up energy. Provide interactive games and treat dispensing toys. When will outgrow is hard to tell, my adult cats also kept on acting like this sometimes, it was fun to watch.

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      Nadine 3 years ago

      My 13 week old kitten is just terrible sometimes. We adopted him/her off the streets when it was only a week old (mother had abandoned it.) Lately it's been exhibiting very wild behavior, running at full speed up and down the halls, climbing and scratching, and most of all biting. Everything has been exactly the same since we adopted it so I don't think it's scared. Maybe rough playing? If so would you be able to tell me at what age he/she will grow out of it? (Still don't know the gender sorry)

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      Adrienne Janet Farricelli 3 years ago from USA

      Sounds like a stressed cat. Most likely the changes in his routine having your friend watch him, had an impact.

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      bus1 3 years ago

      I went on vacation for a week , had familiar friend to cat watch him , when I came home he tried to attack me for an hour or more , I didn't get hurt and stood my ground and tried not to be aggressive back , I shut him in the pantry for an half hour , I sat on couch , and let him out and now so far things seem normal and he brought his ball to play ,is he a phyco cat ??

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      Adrienne Janet Farricelli 3 years ago from USA

      Always see your vet for sudden, unusual behavior changes to rule out medical conditions. What exactly do you do that causes the growling? Picking her up, walking by her?

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      Sarina 3 years ago

      My female cat is all of a sudden aggressive I've had her since she was a week old and we have always loved each other and every time I do something or her daughter does something she growls, hisses or lashes out I'm not sure what's up with her

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      Adrienne Janet Farricelli 3 years ago from USA

      Anytime there's a sudden change in behavior, it's important to see if there have been any recent changes. Did Rafa recently see the vet? was he ever taken out? any health changes? a vet visit at times reveals something that we cannot comprehend. you can try getting a towel and rubbing Shia with it and then rub Rafa with it so he get's any unfamiliar smell off and gets a familiar smell. You can try Feliway plug-ins. Is Shia seeing stimuli out of the window and could it be he's re-directing? try to remove access to windows if he gets too stimulated. Another option, try feeding treats to Shia at a distance every time he sees Rafa, when Rafa is out of sight no more treats. Best option: consult with a feline behavior specialist.

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      Sarai 3 years ago

      Hi there,

      I have three cats (2 boys and a girl) and one of my boys, Shia has been acting out toward my other male cat ( Rafa) for the past few months. I've had Shia since he was 12 weeks old and I got Rafa when he was 10 months; both of them are now 4 years old. Up until recently Shia didn't have a problem with Rafa, they got along great.

      But now whenever Shia sees Rafa, he immediately starts hissing and growling, and then sometimes lunges at Rafa if they are near each other. Shia doesn't have a problem with my female cat at all, only Rafa.

      I have no idea what to do. If you can give me any tips or ideas on how to calm Shia down, that would be so amazing!

      Thank you!

      Sarai

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      Adrienne Janet Farricelli 4 years ago from USA

      A physical exam to make sure the attacking cat is not ill, calming aids such as Feliway, management to prevent rehearsal of behavior and then if nothing medical was found in the cat, behavior modification which is best done along with a professional.

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      KittyBooBoo 4 years ago

      I have two female cats One became very aggressive with our rotweiller out of no wheres yet our rotty would be very submissive and turn her head away from her I decided to finally get both cats fixed thinking that would help but has only made the situation worse and now both cats are aggressively attacking our rotty My boyfriend and I are very concerned and have them locked in our finished basment till we can figure this issue out They are my life and will do anythng need be to get them help but not sure what step to take next Any ideas?? PLEASE HELP!

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      Adrienne Janet Farricelli 4 years ago from USA

      Since you mention they lived together for 8 years, that would make them older than 8 correct? I would mention this behavior to the vet for your cat's next physical--.which should be twice a year in senior cats. At times, reduced senses can be a cause of unusual aggressive behavior. So reduced hearing, or reduced vision at times may cause peculiar behaviors. At the same time, there are stories of cats detecting illness in other cats and reacting aggressively-when the owners couldn't detect anything, until the cat in question was assessed by a vet. Some cats may attack other cats as they become weaker. Just throwing out some possibilities. Did you try a pheromone diffuser such as Feliway?

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      Stephanie West 4 years ago

      I have 3 cats who have lived together for 8 years. Normally, they all get along really well. In particular, two of them, Sammi and Hershey would play together every morning. But now Sammi seems to think Hershey smells funny (nose in the air, smelling around, leading to him) and when she gets close to him, she'll growl, hiss, then when he runs she'll chase and attack him. The third cat Idgy joins in on the attack but seems less bothered by him otherwise. I've inspected Hershey and he doesn't have any cuts, lacerations or abcesses. Everyone is using the litterbox appropriately. He'll just be sitting watching out the window and it's like she hunts him down. Now he's very scared of her. However, all 3 have been laying on the bed with me at night, just in their own litte zones. And this morning when Hershey made a move to change locations on the bed, Sammi gave him the evil eye and meowed so he backed up and that was that. A little later, though, he successfully moved into that new spot.

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      shelbyann19 4 years ago

      Hi. The facts: I have a 2yr old DLH (I shave her when it's too hot), spayed, female. It's just me and her for the most part. My boyfriend comes over every other day or so (for the past 6 months). She doesn't really seek out attention and is not really a lap cat. I have no other pets, but worked in an animal hospital when I was home (in the US) and I've since moved to Egypt, where sometimes I volunteer at the animal hospital. She isn't always crazy about the smells from work (she's never attacked me because of this), but deals with it. My boyfriend wants her to be more of a lap cat so when he holds her, he doesn't let her go until she's calm, but he scratches her chin, which she loves, and a few minutes later is completely asleep! She did fall off of the balcony 12 days ago (from 4 floors) but had no injuries other than shock.

      Anyway, I brought her to bed last night as usual. I got up this morning and she usually follows me into the bathroom. She didn't this morning and when I finally found her, she peeked out from behind the bed in the spare bedroom, then attacked me and scratched my legs. I was able to scuff her after using treats, put a sheet around her hoping to calm her down. (I thought maybe something spooked her over night). Then I let her go and she was hissing, growling and spitting at me...I didn't approach her because I could tell she would attack (again, she's never acted like this before unless I take her to the vet and even then her aggression is not towards me). Even just a little movement (crossing my legs), even though she was 5-6 feet away and she would start growling. So, I called my vet in the States and she said try to put her in a room, with food, H2O and a box of course, and leave her alone for the day or two and see how she does.

      I've been reading about redirected aggression, territorial aggression, medical conditions etc., but could something like this make her change over 10 hours? Is it possible something has been building up and she just lost it? E/D is normal, and no V/D either, so I'm at a loss. Any ideas?

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      Adrienne Janet Farricelli 4 years ago from USA

      Most aggressive cat behavior is caused by stress, fear or pain. It would be best to have her see the vet again to rule anything physical going on. Dilated eyes can be caused by fear but also hypertension. If the cat is by the sun or near a bright light, do the pupils get smaller? they normally should. If she has vision problems, stress and anxiety may develop and make her more reactive.

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      Jessica 4 years ago

      I have a 2 year old female black cat. She got fixed in the first week of April. She was peeing on everything. The vet said she had a bladder infection and fixed her and gave her a shot and she quit peeing. Since then she has gained at least 3 pound and tripled in size. She was a small cat before she got fixed. Her eyes are dilated all the time. One moment I am holding her and loving on her and she is purring then she jumps up hiss's at me and tries to bite and scratch me. She used to be a very loving and affectionate cat. Yesterday we brought in a stray 5 week old kitten and she tried to kill it. She had started attacking our dachshund before we got the kitten. She used to be so close to him that they would cuddle on the couch and play all the time. I don't know what is wrong with her. Any help you can give would be greatly appreciated.

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      Gail Louise Stevenson 4 years ago from Mason City

      You're welcome. It would be real hard to have a cat that won't eat, because of the introduction of a new cat. The cat I have does love to eat and she eats good. The other cat eats good, too.

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      Adrienne Janet Farricelli 4 years ago from USA

      Thanks for stopping by Gail641, tolerating is much better than being miserable. We had a miserable case once where a Siamese cat refused to eat for days on end after a new cat was introduced to the household. The new cat had to be re-homed as the resident cat lost several pounds and they couldn't entice her to eat!

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      Gail Louise Stevenson 4 years ago from Mason City

      I have a female cat that is kind of ornery, but she's a real nice cat. I have my neice's cat and the one cat didn't get along with the other. They didn't make friends, so mostly they tolerate each other. Interesting hub and very informative.

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      Adrienne Janet Farricelli 4 years ago from USA

      Sometimes cats are very sensitive to changes. It could be your cat was used to seeing the post as a stationary object and now that she saw you move it, it terrorized her as she perhaps saw it as a sort of big monster so now she won't go anywhere near it in fear it will "move"again. You can try to use a Feliway plug diffuser or spray or give her some time to realize that the post won't harm her in any way. The fact you closed her in the bedroom with the scary monster didn't help. This in behavior terms is called "flooding" while what you want to do is desensitization and counterconditioning. You can find explanations of these processes in my hubs on dog behavior modification. --it applies to cats as well--You didn't mess up your cat, cats recover from this, but they just need time and gradual exposure. Your kitty won't eat or use the litter box in this case because she's not comfortable and fear interferes with eating and eliminating. It may be a good idea to place her litter box in a place she goes to feel safe for now, and scatter food nearby the areas she fears the most so she learns to associate these places with good things again. Best wishes!

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      Amanda 4 years ago

      Hi,

      We have a 10m/o kitty. I recently moved my cats scratching post from our living room to our bedroom, to give our cat a high up place to sit and look out the window, instead of knocking all of our books off the shelf.

      The instant we did this, she freaked, refused to come and eat and go to her litter (which were right next to the scratching post). I tried to show her that it was a positive thing but the instant she sees it she freaks out and runs away and hides. She would barely play with it while it was in the living room other than sleeping on it from time to time when we were in there.

      This morning I tried to close the door to the room when we put her in there so she could see it was just her scratching post......was the the worst idea ever, she started jumping off the walls and ran into the closet and just started crying. We then decided to put the scratching post back to it's original spot.

      Problem is , is that even though she saw us take it out, she still refuses to come back to our bedroom to eat and use her litter. She just isn't eating or going at all. It has only been a day but Im still worried we may have traumatized her in some way. Did I mess up my cat? How can I help her be okay again? Thanks for any help you can give!

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      Adrienne Janet Farricelli 4 years ago from USA

      Sounds like a case of re-directed aggression if these episodes happen when the cat sees something out of the window and then attacks your other cat.

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      Adrienne Janet Farricelli 4 years ago from USA

      We saw many nervous kitties at the vet, and with cats things get a bit tricky as these animals don't like at all leaving the safety of their homes. Add on top of that a car ride and then going to place where they get shots and stuff stuck up their bum, and you have the perfect recipe for one not-so- happy camper. Cats used to bite our staff much more than dogs, but we know well it's all about fear. There are some calming products for cats now, not sure how well they would work, such as Feliway and Composure cat treats by Vetriscience, Also, google "thundershirt for cats". Here is a helpful read: http://animal.discovery.com/pets/less-stressful-ve...

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      Natalie 4 years ago

      Hi, I have a young cat (2yrs) who is a very lovely but playful little thing. She's not normally aggressive but will be a little feisty when she's had enough of your company. My problem is that she is extremely aggressive when we take her to the vets,so much so that they are unable to examine her. I know it's through fear of the new surrounding and smell, but she is a curious/hunter cat and as a result has had a cpl of scrapes where we needed her checked over. Is there any way we can try keep her calm enough for an exam? I keep her outside the surgery until its time to go in, and speak to her quietly while we we wait, but as soon as we get in there she goes wild. The agression disappears as soon as we get home, but im worried as she's not well this week but the vet can't get near enough to find out what's wrong :-(

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      Adrienne Janet Farricelli 4 years ago from USA

      thanks seanorjoh, my area of specialty is dog behavior but many cat behaviors are common

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      seanorjohn 4 years ago

      Wow, you are doing a great job educating people about cat behaviour. When one of mine was injured she slept high up in the most unusual places and steered clear of her sister. Thankfully she made a full recovery and is friends again with her sister. Voted up and useful.

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      Adrienne Janet Farricelli 4 years ago from USA

      Just as in dogs, some cats may just not get along. The chances of not getting along are higher among male cats. Boots may have figured out how powerful he is and that Oreo is scared of him. His attacking is reinforced if Oreo leaves the area or runs away. This needs to stop. You can place a collar and bell on Boots, so Oreo can be warned when Boots is coming close. You can try to rub both cats with a common towel multiple times daily to transfer scent to each other. And you can set some supervised periods and reward non-aggressive behavior. So say you have Oreo walking by and Boots n your lap is not acting aggressive in anyway...then praise him and then slip him a small treat into his mouth. However, you may need to re-home a cat if things don't get better, it's not right for poor Oreo to live in fear. Best wishes!.

      --Use remote correction to correct aggr

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      hils85 4 years ago

      I have 3 cats. 2 males and a female. My boyfriend and i recently moved in together in August. I had 1 male, Oreo, and 1 female, Delilah. He had 1 male named Boots. It only took no more than a week for Delilah and Boots to get use to eachother. Oreo and Boots took about 2 weeks. Starting earlier in November Boots has become increasingly aggressive only towards Oreo. Oreo is a very timid cat, although large, he's a huge chicken. Boots will attack him while Oreo is using the litter box, sleeping or just trying to walk by. At night i've started to lock Boots out of the room just because i can't sleep with Boots constantly growling and hissing at Oreo. There are no cats outside that he's seen which would cause redirected aggression. He never does this towards Delilah. Both males are neutered and have been a long time. Boots' behavior seems to only get worse and worse, does anyone know what's going on?

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      Adrienne Janet Farricelli 4 years ago from USA

      Hmm... often this behavior is seen when one dog is taken to the vet, let outside and assumes a new smell that makes the other cat nervous. At other times, it could be re-directed aggression. say your cat sees an animal out the window, she may redirect her frustration on him. You can try a Feliway plug in to calm her down or you can try feeding her some high-value treats every time she sees him from a distance so she starts associating him with good things. this is called counterconditioning/ give it a try, best wishes!

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      heather 4 years ago

      no he hasn't... there hasn't been any changes that i can think of... and its only towards him not my dog

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      Adrienne Janet Farricelli 4 years ago from USA

      Was your male cat outside, or to the vet, recently? Any recent changes in the household?

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      heather 4 years ago

      I have a four year old male cat and and one year old female cat. The female cat has always been affectionate and kind. Her and my other cat have always gotten along very well. A lot of the times it seems like he pretends to be her mother and take care of her.

      This morning she started acting very vicious towards my male cat. She was hissing and going after him with her tail poofed out. She was showing her teeth and chasing him. He is more than twice the size of her but he ran for his life and has been hiding upstairs. He wont go downstairs without me and is terrified. We also have a dog but she is only vicious towards my male cat. Like i said before, they have always gotten along. please help im terrified of my once kind and loving cat.

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      Adrienne Janet Farricelli 5 years ago from USA

      Cats are highly sensitive creatures and when they aggress it is often caused by stress. The highly pitched voice may be stressing her and causing defensive aggression. If this happens only in this circumstance, stress could be the culprit.You can try a Feliway plug-in or have a cat behavior specialist take a look. You can try counter-conditioning and desensitization by keeping your child behind the door, scream at a low volume at first while you feed your cat treats if she is able to take them . I have seen horrible injuries from cat bites, so this warrants attention.

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      wborokid53 5 years ago

      My two year old cat i adopted has started going after my daughter and biting her drawing blood but it only seems to be whrn she is screaming. Could it be how high pitch her voice is or is it something else. Please help i am considering giving her away.

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      Adrienne Janet Farricelli 5 years ago from USA

      I had a cat that acted the same way. She used to attack my feet, hiss and growl after my hubby fell on her and then she kept on doing it. Vet said she was healthy and had no clue on how to help her. I used Feliway plug-ins which made things better but she kept on doing it. It also seemed as the carpet was making her nervous as she used to get little shocks on it when she ran. I gave her to my parents which have only tiles and occasionally she still attacks when they wear new shoes or almost step over her. It may help to perhaps drop high-value treats as you walk by. It s my belief that most cat aggression is fear/stressed based.

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      mcagle0401 5 years ago

      I adopted a female cat when she was 6 months old. I was told she was abandoned. She is a very loving cat. She has typical cat behaviour like getting aggressive when over-petting, etc. This past January, I tripped and fell and made a loud noise and she all of the sudden attacked me and started growling. This went on for several days. I took her to the Vet and she was fine physically. I was told not to look her in the eyes and give her time to re-gain my trust as I must have scared her when I fell. I had to keep her isolated and away from me for awhile. She seemed to get over the event after a week or so. Today, I was in the other room and inadvertently left the blinds open and she got her paws wrapped in the blind cord. When I heard her crying, I immediately ran into the other room and rescued her from the cords. She scratched and bit me as I did this. Then, when I walked away, she growled and hissed at me and attacked me. She drew blood. She was like this for several minutes. I finally shut the door to my room and ignored her. After an hour or so, she seemed ok. But, she is still a little leary of me. Do you think she was just scared? Or, will I be going through the event that happened in January all over again?