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Understanding Dog Maternal Aggression

Dog maternal aggression

Dog maternal aggression

Maternal Aggression in Dogs

So your mother dog just gave birth to a litter of puppies, and she just greeted you with the deepest, guttural growl and a shiny demonstration of her pearly whites. Don't take it too personally. You are dealing with a classic case of maternal aggression. While it may be shocking to see this form of aggression in a docile dog that perhaps never showed any form of aggression before, at a closer look, you'll see that it somewhat makes sense. Let's take a look at what is going on in momma's mind during this time.

Protective Over Puppies

After mother dog gives birth, powerful chemical alterations start taking place in her brain. This is not her fault; it's a natural process meant to help her bond with and protect her puppies. These hormones at play are there to up the chances of survival of both mom and her vulnerable puppies. Puppies are pretty much born helpless. They are blind, deaf, without teeth, and on top of that, they're also unable to regulate their temperatures. This makes them totally dependent on their mothers, and rightfully so! It's quite normal for her to be protective.

Hormonal Changes

"OK," you may think. "But, why is she protective with me, since I am the one who has been feeding her all these years, petting her, and treating her like a queen? How can she hold a grudge against me?" The answers are hormones, and if you're a man, you know you shouldn't mess with a lady's hormones, and if you're a gal, you know how hormones affect you in the first place. In this case, we are looking at three hormones at play: oxytocin, prolactin, and estrogen. Let's take a closer look at these hormones, shall we?

Oxytocin is a hormone released by the hypothalamus and acts as a neuromodulator of the brain. The release of this hormone is triggered by the pressure of a puppy against the mother dog's cervix, along with the tactile signals received when the puppies nurse. This hormone has a bonding effect between mother and baby, and for a good reason is known as the "love hormone."

When mother dog is about to give birth, her progesterone levels, which are the hormones of pregnancy, fall abruptly while the estrogen levels climb. The functionality of progesterone, which has a calming effect, therefore is lost, explains Dr. Nicholas Dodman. So this may play a role in making mother dog a bit more grumpy.

On top of that, when a momma dog's levels of progesterone drop, her levels of prolactin (the hormone that stimulates lactation) rise. According to the American Kennel Club Breeder's Handbook, these hormonal changes are responsible for causing the nesting and protective maternal behaviors.

So, the combination of the puppies being so vulnerable along with the series of chemical changes poor momma dog undergoes causes what we call mother dog protectiveness. Not all dogs are maternal aggressive. Yet, surprisingly, your dog doesn't have to have puppies for this form of protectiveness to occur. Some intact female dogs guard items (like stuffed animals) as if they were puppies during a false pregnancy.

Did You Know?

False pregnancy is a bit of a misnomer, since all intact dogs act to a certain extent as if they are pregnant regardless of whether they are pregnant or not. Indeed, during diestrus, all intact dogs undergo progesterone secretions.

How to Deal With Maternal Aggression

So mother dog has been telling you in canine language to stay away, how to proceed? The following first tips are for dogs who have just had puppies and are acting protective, the last tips may apply to dogs undergoing a false pregnancy.


Magical management is central when dealing with maternal aggression. This means you will try your best to allow the new mom to have a quiet place where she can feel less stressed and less threatened. This is definitively not a good time to invite all your family and friends to view the pups. Too much commotion around her may interfere with her new, important motherly duties. It's important that the pups drink colostrum during the first 24 hours. This is a special immune-boosting fluid mother dog secretes from her nipples before producing milk.


Safety is important during this time. Mother dogs may bite if you ignore her growling and snarling. The more you hang around the whelping area and touch the pups, the more mother dog may feel the need to be aggressive. If you need to weigh the puppies each day, you may want to take advantage of when mother dog leaves the pups to potty outside and eat. Have somebody accompany her outside, give her water to drink and distract her with some food. However, many new mothers may go outside just to relieve themselves and will try to immediately come back right inside and may not be interested in food. If children are around, it's best to play it safe and keep mother dog and pups in a room where children cannot have access.

Desensitization and Counterconditioning

Fortunately, the maternal aggressive display tends to fade as the days go by and the pups grow bigger. You can take advantage of this time to teach mother dog that great things happen when you are around the puppies. Every time you enter the room, and come close, feed mother dog high-value treats. You don't need to reach out to her (which she may perceive as an attempt to touch the pups), just toss some treats in her direction. When she appears more accepting of your presence, keeping safety in mind (consult with a behavior professional if you need help), you can try briefly touching a puppy and then feeding mother dog a tasty treat.

Repeat several times so mother dog makes the connection between you briefly touching the puppy and her getting a treat. Afterward, you can raise the bar and touch the puppies for a bit longer and feed mother dog a treat, then lift the puppies briefly and give mother dog a treat. If at any time mother dog growls, you may be going too fast for her comfort and need to take a step back.


Whether mother dog is having a false pregnancy or has maternal aggression after giving birth to pups, spaying will prevent future episodes of maternal aggression. Many breeders agree that should a mother show excessive maternal aggression, she should be removed from the breeding pool and spayed.

Final Thoughts

Fortunately, maternal aggression is rather short lived. It generally starts to fade a few days after giving birth and is generally gone once the puppies reach 2-3 weeks of age and are more independent.

A Note About Safety

If your mother dog is showing any type of aggressive displays, play it safe and see a vet to rule out medical conditions. Consider consulting with a force-free professional to help you out.

For Further Reading

  • Why Is My Dog Panting After Giving Birth?
    Why do dogs pant after giving birth? There are several possibilities, but it's always best to consult with your veterinarian if something doesn't look right.
  • Dog Pregnancy: Complications After Giving Birth
    What complications and problems after giving birth are expected in mother dog? Learn signs of abnormal and normal behaviors and some of the most common conditions requiring immediate intervention of your vet.
  • How to Dry Up a Dog's Milk?
    How to dry up a mother's dog milk? After nursing for quite some time, a time comes when the puppies are being weaned and you want to dry up mother dog's milk supply. How to proceed?

This article is accurate and true to the best of the author’s knowledge. It is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from a veterinary medical professional. Animals exhibiting signs and symptoms of distress should be seen by a veterinarian immediately.

Questions & Answers

Question: My dog became aggressive after giving birth, and she is not giving milk to her puppies. What can I do?

Answer: If the puppies are in danger, you will have to bottle feed them with a puppy milk replacer product.

Question: My female started to attack my male dog after giving birth. Is it normal for a female dog to become aggressive after giving birth and will she start to be aggressive towards people?

Answer: It is quite normal for the mother dog to not want other dogs around after she has whelped. The mother dog is protective as powerful hormones are released which are meant for her to take care of her puppies. Some dogs may show protective behaviors as well towards humans which may cause them to growl when humans come near, but just because she doesn't want your male dog near doesn't necessarily mean she won't want you near. Many new mothers will accept their owners near. However, some in the first few days may growl. Now, if there are a lot of people coming over, this can bother her and stress her, so please keep her in a quiet area away from too much commotion.


Sam on July 16, 2020:

So I thought that this dog and she was pregnant very skinny very abused threatened her up she gave birth earlier today but she's aggressive to the point that we can't move in the house just need some suggestions best way of moving her 2 a room was she can sit by herself and her puppies I do have experience with aggressive dogs but this is the first time with one that just giving birth any suggestions

Adrienne Farricelli (author) on July 03, 2020:

I have yet to see a truly un-smart dog. Dogs are smart in their own ways.

Sarm on June 22, 2020:

I have 22months old boerboel and she pregnant.till now she's timid and my friends consider her unsmart dog.will that change after she give birth.i wish she change

Cath on April 04, 2020:

Hi the mother dog after giving birth to the puppies she growls to the puppy every minute. What do you think is the possible problem of my dog?

Adrienne Farricelli (author) on January 21, 2020:

With mother dogs who hurt their puppies it would be important to rule out medical problems. It could be mother dog has pain due to mastitis or some other medical issue which is causing her to lash out towards the puppies. It would be therefore important to know what the trigger for the rough handling is, and until then, the pups are ultimately not going to be safe unless they are separated.

Monica on January 21, 2020:

Hi I need help my bull terries gave birth to 7 puppies 11 days ago she is an awesome mother but now aggressive behavior towards her puppies if they cry or move or touch each other she bite them on the head and I read this post so I just let it go but now she beating them till they bleed I took them away from her in a warm room and bottle fed them and stimulating them so that they can poop and pee they are very peaceful but she keep on crying for them she want her baby's but she hurts them I don't know what I need to do

Kutchie on October 23, 2019:

Our pyrennees maremma mother accidently got prwgnant at 1 yr and 2 mths old.ahe had 10 puppies.we had to bottle feed some puppies but she qould not stay with pups. We want to keep to the puppies oh, the mother runs at the puppies a hundred miles an hour and hits them and then puts her mouth around them and won't let them go anywhere and the puppies cry if she bites them. We cannot do anything with the puppies with her around can a vet fix her aggression

Adrienne Farricelli (author) on September 16, 2019:

Stacey, usually once weaned, mother dogs start getting a little more intolerant of the pups trying to nurse. No general rules of thumb exist on whether she may get along with the puppy if she stays with her, so it's hard to predict in the long run.

Stacey on February 11, 2019:

What about later on? If i keep a female pup with the mother. Is this agression likly to still occur? For how long?

Kavitha on April 24, 2018:

My 2 year old Labrador gave birth to 6 puppies two days back..while giving birth she was fine and let everyone to touch her puppies..(only family members..)but later on during the day she suddenly became aggressive and grawls very badly at each one of us showing her cannine..she doesn't even let us to feed her..I am worried about such a behaviour of her.. please can you help me? to deal with it..

Adrienne Farricelli (author) on February 01, 2018:

Rina, you are right to be concerned. It would be best to keep her in a room your daughter doesn't have access to for safety, or you can put up a baby gate she can't get out of. It never hurts to be cautious.

Rina on January 30, 2018:

I'm curious.. I have a 3 year old dog who just gave birth 4 days ago and she is in her safe place with her pups. She growls when my 6 year old daughter even looks into the room. I know she needs time and space to deal with her hormones, yet I'm wary because I can't have her if she draws blood. Do you have any suggestions for me??

Barrie Copnell on November 16, 2017:

My is showing aggressive behaviour towards

Her 2 day old pups n found one dead this morning with no visible puncture wounds

Or rips or tares , it’s her second litter with 7 bull terrier pups , please help finding it too distressing , bitting around head n body

Nels on August 01, 2017:

Our momma seems to treat 1 puppy particularly rough when playing. It was the first born and the only white puppy out of an otherwise all black litter?

Devin Simmons on July 13, 2017:

For some reason, my dog growls at me at random times. She is typically so relaxed with me that she'll fall asleep knowing I am around and/or holding a pup. I have to stay close to her cage because she has 10 puppies and the cage isn't exactly huge. So occasionally she might sit on one or squish it between her body and the cage. She doesn't seem to care or even make an attempt to move so I always have to be around when she sits near her pups so I can move them out the way just before she sits down. Just now though, she wouldn't let me so much as touch the top of her head without her growling. So I'm very confused on why she seems to be this way (She's been bleeding quite a bit and would take 30-40 minute breaks from the pups sometimes, not sure if thats ok but I just wanted to include that)

Adrienne Farricelli (author) on March 07, 2017:

Do you mean she is growling when she is nursing? or when she is eating?

Liz Drennon on March 05, 2017:

My 7 yr old Australian Shepherd had 4 puppies 1 day ago. She is growling an snapping sometimes while feeding. Any idea why? I tried helping her get comfortable made a bed in garage next morning day 2 pups had crawled behind washer an dryer .