Why does my puppy bite so much (and how do you stop it)?
A puppy bites because biting is part of puppyhood: he explores the world with his mouth, still has to learn bite inhibition, starts teething around three months old, and is most often overstimulated or tired. That last cause is the most underestimated one and explains most of the biting. Address the cause and the biting largely disappears on its own. You never punish it. And it says nothing bad about your relationship: the biting is often worst with the person the puppy has the best bond with, because with you he feels safe enough to express himself.
In short
Biting is normal puppy behavior, not revenge and not dominance.
The biggest cause is overstimulation. A young puppy needs 16 to 20 hours of sleep and rest per day.
Prevent, redirect, offer an alternative, and teach, in that order. Corrections damage the bond of trust.
You never punish growling: that is the warning you want to keep.
If you suspect pain or itching, have his body checked.
A puppy shows you he is going over his limit before the biting starts. Learn to see those signals in the free webinar.
The causes of biting
Cause | What you see | What you do |
|---|---|---|
Exploring with the mouth | Everything goes in the mouth: hands, pant legs, furniture | Puppy-proof the house, enough chews, redirect calmly |
Learning bite inhibition | He bites too hard without realizing it; he learned a little of this from his mother and littermates, and now from you | Calmly stop the game as soon as it gets too hard, no startled reaction |
Teething, from around three months | Loose or missing teeth, harder biting, more destruction, quicker to hit the zoomies, sometimes looser stools | A variety of chews, a cold washcloth from the freezer, few new stimuli |
Overstimulation and lack of sleep | Busy, wild, big eyes, yawns and then plays even harder, bites more at the end of the day | Build in rest after every activity, at most one impressive activity per day, stop the game before the teeth come out |
Tension when touched or held | Bites or growls when you pick him up, hold him, or lean over him | Stop, give space; approach from below; never punish growling |
Pain or itching | Suddenly bites much more, scratches, is irritable when touched | Vet: ears, skin, belly |
In summary: a puppy bites to explore, to learn bite inhibition, because of teething from around three months, because of overstimulation and lack of sleep, because of tension when touched or picked up, or because of pain or itching. Per cause, what helps is a puppy-proof house with chews, calmly stopping the game when it gets too hard, a cold washcloth during teething, rest after every activity, giving space around touch, and a vet visit when the biting suddenly increases a lot.
Sleep: the cause almost everyone underestimates
A young puppy may well sleep and rest 16 to 20 hours a day. Dogs sleep spread across the whole day (roughly 40 percent during the day and 60 percent at night), prefer to sleep close to their family, and need both dream sleep and deep restorative sleep. Lack of sleep causes stress, and stress causes more biting. What looks like enthusiasm is usually tension. The same goes for jumping up on people and wanting to lick everything.
Here is how you make sure he gets enough sleep:
A safe, comfortable sleeping spot, preferably slightly raised, and several spots to switch between: high and low, soft and cool.
Never let your puppy sleep alone in the first nights. Put his bed in the bedroom.
Never wake a sleeping puppy.
Build in a rest moment after every activity. We cannot fall asleep right after a workout either. Let your puppy wind down first with something relaxing: chewing, sniffing, a lick mat.
At most one impressive activity per day, with rest days in between.
A closed crate does not help here: in one, a puppy cannot stretch out full length for his dream sleep, cannot switch spots, and cannot be close to you. An open playpen or safe spot is the kind version; you can read why in Crate training a puppy: why we advise against it.
Stopping puppy biting in four steps
We guide behavior in four positive ways, always in this order. The explanation of the method itself, with all the examples, is in Training a puppy without punishment; this is how you apply it to biting.
Prevent. Behavior that cannot be performed also cannot be learned. If you see the biting coming (busy, wild, the eyes getting big), stop the game and lower the stimulation before the teeth come out.
Redirect. With a calm voice and a calm movement, not with a startled reaction or a “no.”
Offer an alternative that fits the need. Does he want to chew? Give him something he is allowed to chew: a chew bone, a toy, or during teething a cold washcloth from the freezer. Is it tension? Choose something calming: searching for treats, sniffing, licking.
Teach him how it is allowed to go. Teach your puppy the hand signal: a low, loosely opened hand with the palm toward your puppy, without eye contact. Not a command, but a calming message: “I have got this, you do not have to do anything.” Teach it in a calm setting, one or two short moments a day of no more than six repetitions, and use it later for jumping up and biting.
Does your puppy get it wrong anyway? Stay calm. A tap, a shout, or a grab by the scruff always damages the bond of trust and makes you unpredictable to your puppy.
Growling? Never punish it
If your puppy growls when he bites or when a child comes too close, that is a warning signal and exactly what you want to keep. Punish the growling and your puppy learns to skip the warning, and later he can snap with no warning at all. Respect the growl, take your puppy out of the situation, and think about what caused it. Never leave a puppy alone with a young child, not even for a moment. What growling means in each situation is covered in My dog is growling: what is he saying?
From our practice
Sabine F. wrote on Trustpilot (June 18, 2026, 4 stars): “I am nowhere near finished with the course, but from what I have learned so far, I have started to read and understand our puppy much better. I made small adjustments that already make a big difference in daily life.”
With biting, those small adjustments are almost always the same ones: stopping the game sooner, more sleep, and the hand signal instead of “ouch” or “no.”
When to get help
Is your puppy biting really hard, with lifted lips and a stiff body, or does he keep biting when you try to let go? Then do not start experimenting on your own, but have a welfare focused behavior consultant take a look. Do not see that as failing, but as something good that you learn from. If you are unsure whether his body is all right (itching, ear pain, stomach pain), have the vet check. Pain makes biting worse.
Frequently asked questions
My puppy bites really hard. Am I doing something wrong?
No. Biting comes with the territory and says nothing about your bond. Check whether your puppy is sleeping enough, lower the stimulation, offer replacement behavior the moment you see it coming, and use stress reducing activities.
Should I yell “ouch” when he bites?
A startled reaction often makes an overstimulated puppy even busier. Stay calm, stop the interaction, and offer an alternative. You mostly prevent biting by stopping the game before your puppy goes over his limit.
How much should my puppy sleep?
A lot: 16 to 20 hours of sleep and rest per day for a young puppy. Too little sleep is the fastest route to more biting.
Does it go away after teething?
The peak usually drops once the teeth have been replaced, but a puppy who gets too little rest or too much stimulation keeps biting. Addressing the cause works better than waiting it out.
Sources
ASPCA. Mouthing, Nipping and Play Biting. Biting in play is normal behavior between littermates; keep play short and stop when it gets too wild.
Read next
When is a puppy potty trained, and how do you help him?
Crate training a puppy: why we advise against it and what works instead
Training a puppy without punishment: the four ways to guide behavior
Why does my dog yawn so much?
Biting is the last step in a row of signals
Before your puppy bites, he has already shown you all kinds of things: he gets busy, yawns, turns his head away, licks his lips, or plays harder and wilder. That is dog language, and anyone who learns to read it steps in before the teeth come out. That saves you both a lot of frustration. In the free webinar Communicating With Your Dog you see, with real puppies, how “busy and happy” turns into “over the limit,” and you learn a technique to calm your puppy down without using your voice.
Want to get through the whole puppy period with love and without stress, from sleep and potty training to biting and being alone? Then the Stressless Communication Course was made for the two of you.
Thank you for reading, on behalf of me and all the dogs.
Dog Behavior Consultant & Natural Dog Trainer