Almost every new puppy owner reaches a point, usually around week two, where they quietly wonder whether they have adopted a small crocodile. Hands, sleeves, ankles, hair. Blood, sometimes.
This is normal. It is also the single most misunderstood puppy behaviour there is.
Why puppies bite
Puppies explore the world with their mouths in the way human babies explore it with their hands. They have no other way of investigating texture.
On top of that, biting is how puppies play with each other. Your puppy is not attacking you. They are trying to play with you using the only equipment they have.
Teething adds to it. Between roughly three and six months, adult teeth push through and the gums genuinely hurt. Chewing provides relief.
The single most important factor: sleep
Before any training technique, check sleep.
Puppies need somewhere between 18 and 20 hours of sleep a day. Most puppies who bite savagely in the evening are not badly behaved — they are exhausted. The behaviour looks manic because it is manic, in exactly the way an overtired toddler is.
If your puppy turns feral between six and eight in the evening, that is the classic pattern. Put them somewhere quiet with something to chew and most fall asleep within five minutes.
What actually works
Redirect, every single time
Keep a soft toy within reach in every room. The instant teeth touch skin, put the toy in the mouth instead. You are not punishing the bite, you are answering the question your puppy asked: what am I allowed to chew?
End the game
If teeth land on skin, the fun stops. Stand up, fold your arms, and be boring for ten seconds. Then resume.
This mirrors how puppies learn from each other — bite too hard and your littermate stops playing.
Reward the mouth being empty
Puppies get enormous attention for biting and almost none for lying quietly. Flip that. When your puppy is chewing their own toy, drop a treat next to them without a word.
Give better outlets
A frozen stuffed rubber toy is the single most effective anti-biting device in the house. Cold helps sore gums and the work is absorbing.
KONG Puppy Natural Rubber Teething Toy
Softer rubber formulated for puppy teeth, with a hollow centre you can stuff and freeze. The version to buy while baby teeth are still present.
Pupstages Cool Teething Stick
Soak it and freeze it. Designed specifically for the teething phase, when cold matters more than durability.
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What makes it worse
**Shouting or yelping dramatically.** A high-pitched squeal excites many puppies further. If yelping makes your puppy bite harder, stop doing it.
**Holding the muzzle shut, pinning, or alpha rolling.** These teach a puppy that hands near the face are threatening. That is exactly how you create a dog who dislikes being handled — and it does nothing to reduce play biting.
**Rough hand games.** Wrestling with your hands teaches that hands are toys. Use a tug toy instead so there is always something between your skin and the teeth.
**Inconsistency.** If biting is funny when the puppy is eight weeks old and forbidden at five months, you have taught them to try it and see.
How long it lasts
Play biting generally reduces sharply once adult teeth are in, around six months, and most dogs are through it by nine months. Adolescents sometimes have a brief relapse.
If a puppy is still biting hard at eight or nine months, it is usually because the behaviour has been unintentionally rewarded with attention and excitement.
The honest summary
Protect sleep, redirect onto a toy every time, end the game when skin is touched, and keep something frozen in the freezer.
It is a phase, it is normal, and nothing you do needs to involve hurting or frightening your puppy to get through it.
