Why does my puppy bite so much?
Updated By PetymFacts checked against official sources on
Quick answer
Puppies bite because they explore and play with their mouths, and teething makes their gums sore. Over-tiredness, over-excitement and boredom make it worse. It usually eases once adult teeth are in, at around seven months. Redirect the mouth onto toys, stop play for a few seconds when teeth touch skin, and never hit or shout.
Most puppy biting is normal play. Biting with a stiff body, growling or pulled-back lips, or biting that starts suddenly, can mean fear, frustration or pain: talk to your vet. In India, if a puppy's bite breaks the skin, wash it well and see a doctor the same day.
Why do puppies bite and mouth?
It is normal behaviour, not aggression or dominance.
Dogs Trust explains that puppies use their mouths to explore the world around them and to play. Teething makes gums sore, so chewing feels soothing. Over-excitement, over-tiredness, boredom and wanting attention all drive more mouthing, which is why the evening 'crazy half hour' often ends in nips.
Puppies learn how hard they can bite from each other. The ASPCA calls this bite inhibition: a puppy that bites a littermate too hard gets a yelp and the game stops. Your job is to carry on that lesson, so that your dog learns people's skin is very sensitive.
Sleep matters more than most owners realise. Dogs Trust says puppies need 18 to 20 hours of sleep a day, and that overtired puppies mouth more. A puppy biting everything in sight often needs a nap, not more play.
When does puppy teething and biting stop?
From Dogs Trust. Timings vary with size.
About 4 weeks
Baby teeth come through, before the puppy leaves its mother. Dogs Trust
About 12 weeks
Baby teeth start to fall out and adult teeth push through. Chewing and mouthing often peak. Dogs Trust
About 7 months
Adult teeth are usually all in. Mouthing typically drops once teething finishes. Dogs Trust
Any age
There is no fixed age when mouthing stops: dogs learn at different speeds, and consistent handling helps it fade sooner. Dogs Trust
How do I stop my puppy biting?
Teach what to bite instead, and make biting people end the fun.
Do
- Keep a toy in your hand during play and offer it the moment the puppy goes for hands or clothes. Tug and fetch can replace hand-wrestling. ASPCA
- If teeth touch skin, go still, drop or hide the toy, fold your arms and turn away. If it carries on, step away or behind a gate for a moment. Dogs Trust
- Pause play for 10 to 20 seconds after a hard bite, then start again calmly, as the ASPCA describes. ASPCA
- Reward calm behaviour by restarting play, offering a chew or gentle fuss. Dogs Trust
- Rotate chew toys so they stay interesting; puppies chew to relieve teething discomfort. ASPCA
- Agree house rules so everyone at home, including the domestic help, responds the same way. Dogs Trust
Don’t
- Hit, slap or flick the puppy's nose. The ASPCA warns it can make puppies bite harder, become afraid, or develop real aggression. ASPCA
- Shout, punish or push the puppy down. Dogs Trust says this can increase fear and frustration. Dogs Trust
- Snatch hands and feet away quickly, or wave fingers in its face. It turns biting into a game. ASPCA
- Wrestle or let the puppy chew hands and feet, even playfully. Dogs Trust
- Use pain-based tools or 'alpha' methods. AVSAB says reward-based methods are more effective and aversive methods are not necessary. American Veterinary Society of Animal Behavior
When is puppy biting not normal?
Most nipping is play. These signs need more help.
If A stiff or frozen body, lips pulled back, growling, and bites much harder than play.
The ASPCA says some puppies bite out of fear or frustration. Stay calm, do not yelp, and get help from your vet and a qualified behaviour professional. ASPCA
If Biting that starts suddenly, gets worse, or comes back after improving.
Dogs Trust advises veterinary advice, as this can signal pain or illness. Dogs Trust
If Growling when you go near its food, toys or bed.
Do not punish the growl: RSPCA NSW says a punished growl can become a bite. Give space and ask your vet or a behaviourist. RSPCA NSW
If A bite that breaks a person's skin.
Wash it at once with soap and running water for at least 15 minutes and see a doctor or a government anti-rabies clinic the same day. The doctor decides on treatment. World Health Organization
What do people get wrong about puppy biting?
You may have read
A biting puppy is trying to be dominant.
Myth
What the sources say
Dogs Trust describes mouthing as a natural way to explore and play, made worse by teething, tiredness and excitement. Dogs Trust
You may have read
Holding its mouth shut teaches it a lesson.
Myth
What the sources say
Physical punishment can make puppies bite harder or become afraid, the ASPCA warns. ASPCA
You may have read
It will grow out of it on its own.
Myth
What the sources say
Mouthing usually drops after teething, but consistent handling is what makes it fade sooner. Dogs Trust
You may have read
A puppy bite cannot carry rabies.
Myth
What the sources say
WHO says rabies spreads via saliva and that dog bites and scratches cause 99% of human rabies cases. A doctor decides on treatment, so see one if the skin is broken. World Health Organization
How do I keep children safe with a biting puppy?
Children are the most tempting chew toys: quick hands, squeals and running feet all excite a puppy. Supervise every interaction, teach children to stand still like a tree and fold their arms if the puppy nips, and give the puppy a safe place to retreat to. Dogs Trust advises against rough play, and RSPCA NSW says a puppy should be left alone when it is resting or eating.
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Questions owners ask
At what age do puppies stop biting?
- There is no fixed age. Dogs Trust says mouthing typically drops once teething finishes, at around seven months, when adult teeth are usually all in. Consistent responses from everyone at home and plenty of sleep help it fade sooner.
Should I yelp when my puppy bites?
- The ASPCA suggests a high-pitched yelp and a limp hand when a puppy bites hard, followed by a short pause in play if that does not work. Some puppies get more excited by a yelp; if yours does, simply go still, turn away and end the game for a moment instead.
Why does my puppy bite more in the evening?
- Usually tiredness or over-excitement. Dogs Trust says puppies need 18 to 20 hours of sleep a day and overtired pups mouth more. A calm settle in its bed with a chew, or a nap, often works better than more play.
Is it normal for a puppy to bite and growl when playing?
- Play growls during tug are common and usually come with a loose, wiggly body. A stiff or frozen body, pulled-back lips and much harder bites are different: the ASPCA says these can signal fear or frustration and need professional help.
My puppy's bite broke the skin. Do I need a rabies injection?
- Wash the wound at once with soap and running water for at least 15 minutes and see a doctor or a government anti-rabies clinic the same day. In India, the doctor decides whether rabies treatment is needed, depending on the exposure and the dog's history. Do not wait to see.
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Sources
Each source was opened and read on the date shown. How Petym checks its sources
- Dogs Trust: Mouthing, nipping and puppy biting: causes and how to stop it safely (opens in a new tab)
- ASPCA: Mouthing, nipping and biting in puppies (opens in a new tab)
- ASPCA: Destructive chewing (opens in a new tab)
- American Veterinary Society of Animal Behavior: Position statement on humane dog training (2021) (opens in a new tab)
- RSPCA NSW: Happy Healthy Puppies (2026) (opens in a new tab)
- World Health Organization: Rabies: fact sheet (opens in a new tab)