Understanding Your Dog's Teeth Chattering

Updated on January 26, 2017
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Adrienne is a former veterinary hospital assistant, certified dog trainer, behavior consultant, and author of "Brain Training for Dogs."


What's Up With Dogs Chattering Their Teeth?

You may be wondering about this behavior at one time or another out of your years of dog ownership. It could be you just happen to hear the noise of your dog's teeth clacking against each other when you grab the leash, or perhaps that chattering is heard when your dog is sniffing a particular spot. What gives?

First, a word of clarification is warranted. In this article, teeth chattering refers to the noise made when dogs open and close their teeth quickly in sequence, producing a similar noise to when humans feel cold. The teeth chattering noise is often short lived. By the time you look at your dog, it often has already stopped. Teeth chattering should not be confused with air snapping, a behavior seen in dogs when they open and close their mouth as if biting the air. Air snapping is different from teeth chattering and is often a warning sign of a potential bite. Teeth chattering should also not be confused for the teeth clacking noises made when dogs are playing side-by-side and engage in a lazy game of jaw sparring.

Also, it's important to clarify that with many other odd doggy behaviors, we can often only make a few assumptions because until Rover can talk, we won't ever be able to get into his head and deduce what's really going on, even if we were blessed with special psychic powers. However, we can sometimes make some educated guesses based on the context in which these behaviors occur.

So next time you hear that teeth chattering noise from your dog, make sure you pay extra attention to what is happening. Chances are, you may get a better insight on what is triggering it. In the meanwhile, here are some reasons why dogs chatter their teeth.

Dogs Can Actually "Taste" Smells

In case you didn't know, dog noses are blessed with about 300 million scent receptors compared to a human's mere 5 million. Yes, we can call them noses on legs or walking noses! So when your dog is sniffing a spot, he's not only smelling, but there are chances he's actually "tasting the smell."

You see, on top of having a powerful nose, dogs also have what's known as the "vomeronsal organ." This organ is shaped like a small pouch and is located between the nasal and vomer bones which are located at the roof of the dog's mouth. The main function of this organ is to send chemical messages known as pheromones, which dogs leave behind as an act of communication. The organ therefore receives these messages and relays them to the brain to several specialized compartment relating to mating, communication, social situations, etc.

Now, you must know that dogs also have a little duct known as the "incisive papilla" which happens to be conveniently located behind the dog's top incisor teeth.This duct connects the dog's nose with his mouth.

So when you see Rover concentrated on sniffing a spot, he's carefully analyzing the scent. If you see your dog chattering his teeth while he's sniffing it means that he's basically sending large scent molecules towards his incisive papilla (with some help from the tongue). Then, those scent molecules will reach those special areas of your dog's brain and your dog may be making some decision making based on his findings. Perhaps he'll just urine mark on top of the area or leave. There you go, now you know why your dog poses a deaf ear when you call him while he's sniffing! He's super concentrated!

Jacobson’s Organ is a “sense of smell” receptor that is actually not receptive to ordinary odors. Rather, the scenting nerve cells of the organ are quite different from those in normal olfactory tissue in that they respond to a range of substances that have large molecules, but often no detectable odor.

— Dr. Randy Kidd DVM

And It's Often a Male Thing


As you may already know, pee in the dog world is much more than just excrement; indeed, for dog kind it is used as a form of communication. And this is why you can commonly see dogs sniffing electric poles, lamp posts and fire hydrants: these areas are frequently urine marked by dogs.

Urine tells dogs a whole lot about the dogs who have left their droplets of pee-mail. These drops of urine act like social messages, a canine's style of Tweeting or posting a message on a Pinterest board. What exactly can dogs tell from sniffing some urine? Until dogs can talk we won't know for sure, but it likely tells the dog about a dog's age, sex and reproductive status.

Male dogs in particular are often eager to sniff urine and female dogs to determine if they are in heat. Instead of a date and movie, a female dog deliver pheromones through their urine. Cool, huh?

Teeth chattering in this case, allows the dog to carefully analyze the smell and determine if the female dog is in heat and if she is, perhaps even at what point she is. Is she receptive or at the "I am not ready yet" flirty stage? The teeth chattering behavior in this case, for those horse people out there, is somewhat similar to the flehem seen in horses. Some dogs may also foam at mouth while chattering their teeth. For neutered dogs, you may notice the same chattering behavior. Just because they are neutered doesn't mean they won't be interested in certain smells!

Your dog may lick up a small sample of urine and then chomp his jaws slowly up and down, sometimes foaming a bit at the mouth at the same time... Intact male dogs are especially likely to sample urine; it's sort of like reading a girlie magazine or visiting an online dating site.

— Caroline Coile

Dogs May Be Head Over Heels in Anticipation


Besides mating season and intact male dogs, there are so many reasons dogs may chatter their teeth and scientists have still yet to crack every secret in canines. But yet another cause a dog may chatter his teeth is in sheer excitement.

You may therefore observe teeth chattering in dogs while you're pouring dog food into a bowl, coming in the door to greet your pet, or even pulling out a leash for a walk. This is very similar to the feeling you get when a pizza man knocks on your door, yup, lots of anticipation for those pizza lovers out there!

Also the anticipation of play might cause some occasional teeth chattering as well, as an upcoming fun training session. Does your dog ever chatter his teeth when you get the clicker out? If yes, kudos to you for making it so much fun!

When a dog's teeth are chattering this isn't a sign he is cold, but generally indicates happy anticipation. A dog who is expecting an especially good toy or who's in the middle of an exciting play session may chatter his teeth.

— Matthew Hoffman, Dog Speak

But At Times,Teeth Chattering May Be a Sign of Trouble


OK, don't want to be a party-pooper, but sometimes teeth chattering in dogs isn't one hundred percent safe in certain situations. Your dog could be in stress or trying to signal that something is wrong. Prolonged teeth chattering could be caused by a dental or a neurological problem such as seizures/tremors. And it could be something as light as an allergy to something your dog may have sniffed. Always play it safe when it comes to your pet's health. If you ever think anything is wrong, it is highly recommended you bring him/her to the vet.

On a lighter note though, in more cases than not, teeth chattering is nothing to worry about. In many social situations, it's just as common as talking. Whether it's playing, sniffing out a potential mate, or sniffing another dog's territory, it is always good to allow your dog to exercise his vomeronasal organ. After all, it's there for a reason, so why not put it to good use! Happy sniffing!

We see teeth chattering in dogs for a number of reasons. One may be pain in the mouth, bad teeth. Another is a trigeminal nerve irritation similar to shingles in humans. It could be central nervous system problem and similar to a seizure.

— Dr. Denise Colgrove

Questions & Answers

    © 2016 Adrienne Janet Farricelli


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      • alexadry profile image

        Adrienne Janet Farricelli 4 weeks ago from USA

        If your dog chatters his teeth when he smells something bad, consider that for us the smell may be "bad" when for dogs it may be intriguing. Dogs are drawn to smells that make us retch.

      • profile image

        Dolly 5 weeks ago

        I have a 4 yr old male chuahua. He chatters his teeth ONLY when he is smelling something bad. Another dog or cat's hind quarter ( foul smell, I assume) or he has found an " invisible" stain on the concrete???

        Very informative article. I had wondered why he did this for years. Do cadaver dogs do this, I wonder?

      • alexadry profile image

        Adrienne Janet Farricelli 2 months ago from USA

        CP, so cute, sounds like he loves cheese!

      • profile image

        CP 2 months ago

        My 2 year old Maltese starts chattering his teeth when we give him a tiny tiny peice of cheese for a treat. Once we give him the first peice, his teeth chatters for a 2nd peice :) We believe this is normal, and it's so adorable to see him so excited to get a peice. :)

      • profile image

        Lynn L 3 months ago

        Our dog’s teeth chattered after a massage. She’s Almost 11 so following a lengthy snowshoe yesterday we noticed her moving slow this AM— stiff joints like us!!! She was happy to receive rubs and then her teeth started chattering - hopefully a sign of sheer delight!

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        Sherry Knigh2 4 months ago

        My dog minnie has been chattering her teeth alot. She has been going through some medical problems such as losing her her fur, due to allergies. I don't know what to do for her I noticed her teeth are bad would it hurt her if i rubbed some orgel on her teeth and gums

      • profile image

        Shirlnga 6 months ago

        Could be, Adrienne. She's like me, doesn't do well with meds.

      • alexadry profile image

        Adrienne Janet Farricelli 6 months ago from USA

        Interesting Shiringa that your dog chatters her teeth when she's on antibiotics, who knows maybe it's from a side effect like having an upset tummy from it?

      • profile image

        Shirlnga 6 months ago

        My springer spaniel does this EVERYTIME she's on antibiotics! No other time.

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        Madison 6 months ago

        My dog just gave birth within the last hour and she tends to over lick them. When I tell her no, she looks at me as if she’s nervous and concerned then her teeth start to chatter for about 15-25 seconds. It’s her first litter so I don’t know if this is normal for her, any advice or insight?

      • alexadry profile image

        Adrienne Janet Farricelli 7 months ago from USA

        I would keep an eye on this behavior and if it makes you uncomfortable have a professional come in your home for an assessment.

      • profile image

        Lindsey Williams 8 months ago

        I have a mix lab. I recall when she had puppies, she would chatter her teeth at anyone that handled her puppies (other then myself and my husband). That was the only time she did it. Now fast forward 2...3 years later and I've had my first baby and occasionally I find her chattering her teeth again, at me or at the baby when I go to pick the baby up. Should I be concerned at her warnings? My dog, Nala, is 4.

      • alexadry profile image

        Adrienne Janet Farricelli 8 months ago from USA

        It is difficult to say why your dog started teeth chattering, if she seems like she is acting sick or the behavior concerns you, it's always best to see the vet.

      • profile image

        Vicki 8 months ago

        My 2 year old started chattering her teeth shortly after she had puppies it stopped for about 3-4 months and this past week she has started doing it again she has also started her heat cycle 2-3days ago... What could be causing it should I be worried?

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        Megan S 8 months ago

        Our black lab only chatters her teeth when I am getting her food ready!! It is something new the last food days! We have never noticed it. Seems very wired!

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        Rushelle 12 months ago

        I just gave my 3year old male pit bull a little bit of milk, & he came over and cuddled up to me, & started chattering his teeth & also was lightly whining, sighing.... anyone know why?

      • alexadry profile image

        Adrienne Janet Farricelli 12 months ago from USA

        Lyndsey, it's hard to say what her emotions are without seeing it happening. It can be just excitement but it can also be anxiety or arousal from predatory drive (yay, a squeaky toy that moves!) which can be obviously problematic. it definitely is an exaggerated response but it's expected being that it sounds like your dog never met cats before. I would thread with caution and always assume the worse, and if you decide to adopt the cat do very gradual introductions (like keep kitty in crate) and keep your dog on leash for safety to get used to each other's smells. Rub towel on cat and then let dog sniff it. Kittens are easier to get used to dogs than older dogs to kittens, but you can never be extra cautious!.

      • profile image

        Lyndsey 12 months ago


        Quick question. My dogs have never really seen cats before..well my neighbor had kittens (I'm a huge cat person..the fiance is a dog person). Anyways I really want a kitten...today the neighbor and I brought over one of the babies (held it close so she can see, hear and smell but that's about it). Her teeth were chattering and she was kind of foaming at the mouth. My neighbor held the kitten out a little and my dog licked its butt.. and than continued chatterng.. I'm super confused if that's a good sign or bad sign??? She was jumping up and down like she was excited... but she is a guard dog so I'm worried if it's more of an aggression thing? I know she wasn't snapping because I've seen that..it was teeth chattering.

      • alexadry profile image

        Adrienne Janet Farricelli 12 months ago from USA

        Mia, I would suggest seeing the vet so to see if there could be an underlying medical problem causing your dog's teeth chattering when falling asleep.

      • profile image

        Puckroger 13 months ago

        My Dobermans teeth chatter, only when she's resting not sleepy. Weird it's been going on 2 1/2 month, I took her to the vet she would bite you if you examine her mouth

      • profile image

        mia 13 months ago

        my dog is 14 years old and sometimes when shes trying to get to sleep her teeth just chatters , is it old age and is there a way to stop that so she can have some peace

      • alexadry profile image

        Adrienne Janet Farricelli 13 months ago from USA

        Del123, That's interesting and kudos for you for putting your investigative hat on and finding out what was causing your dog's teeth chattering!

      • profile image

        Del123 14 months ago

        My dog had teeth chattering / jaw tremors for two years. Vet visits came up with nothing. It was especially bad when she was resting and falling asleep. I recently determined that it was a wheat allergy - including wheatgrass. I would have never realized had I not had some friends visit who gave her pretzels as treats, and she was much worse that night. Since she eats field grass in the summer I've been putting wheatgrass in her food during the snowy winter months, thinking it was good for her. Instead I've basically been poisoning her for two years. When I stopped the wheat-treats and wheatgrass, tremors immediately stopped. My recommendation: check everything your dog is eating, and try changing it all up. E.g. some dogs are allergic to chicken, etc.

      • alexadry profile image

        Adrienne Janet Farricelli 15 months ago from USA

        Megan, it's hard to say why your dog is chattering her teeth without seeing the actual behavior. It may just be a reaction to your baby's smell or it could be a sign of excitement. Perhaps there's a bit of anxiety mixed in, if she's expecting you to step in and say "no" if your dog's next move is usually trying to lick her face. If it happens only and exclusively after licking your baby's hands, it's likely unlikely a health problem, but it never hurts mentioning it to the vet. It's good you are always careful how they interact, and it's important that the behavior you are seeing is differentiated from snapping, which is something that can mean an impending bite. When in doubt , it's always best to have a professional intervene for an assessment.

      • profile image

        Megan 15 months ago

        My dog is 6 and lately she chatters her teeth after licking my babies hands... I say "no" when she tries to lick my babies face and pull her away- She is not aggressive towards the baby but this is the most interaction they have had to date, my daughter is only 5 months and has just started noticing our dog and joys having her hands licked so I figured this is a good thing- but my dog is definitely a little jealous (she will take a baby toy if I'm nursing or playing with the baby and not paying attention to her) so I'm careful about how they interact etc. But I've never seen this behavior in my dog before and I'm concerned. She doesn't seem anxious when she is interacting with baby, she is happily licking babies hands and then it's most like her jaw locks, she can't open her mouth, they chatter long enough that I hear it and then see it- so maybe 10-15 seconds, her ears go flat and I can tell she doesn't like the teeth chattering. Her teeth seem fine... What could this be? Behavioral? Or should I see my get?


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