Why dogs do it
Why does my puppy bite so much?
A puppy's mouth does the job your hands do. It grabs, tests, carries and plays. So when sleeves, ankles and fingers get mauled every evening, the puppy is rarely being bad. It is usually tired, teething or trying to start a game. Knowing which one you are looking at changes what helps, and it tells you when the bites are not a training question at all.
Last reviewed October 4, 2026
Reading the bites
Teething, play and the overtired crash look different.
Teething bites tend to be chewy and slow. The puppy gnaws on a hand or a chair leg as if working at something, and may drool or show a little blood on toys while adult teeth come through. Play bites come with a loose, bouncy body, play bows and quick darts in and out. They often spike when someone moves fast, wears a dangling sleeve or wiggles toes under a blanket.
Overtired biting is the wild one. Late afternoon or evening, the puppy gets zoomy, harder with the mouth and deaf to everything it knew an hour ago. Many owners call it the witching hour. Then there is bite inhibition: the soft mouth puppies learn by feedback from littermates and people. A puppy who left the litter early, or who has only had human hands to practice on, may simply not know how hard is too hard yet.
- Chewy gnawing suggests sore gums
- Bouncy darting points to play
- Evening frenzy often means overtired
- Hard pressure means inhibition unfinished
Vet or training
Sort the medical questions out before the manners.
See your vet if biting arrives with yelping when handled, a sore mouth that will not let the puppy eat, sudden guarding of food or a body part, or a puppy who bites when lifted. Pain changes behaviour, and a vet is the right person to rule it in or out. Rigid freezing, hard staring and growling before a bite also warrant a professional assessment rather than home fixes. Never punish a growl; it is information.
For ordinary mouthy puppyhood, management comes first: proper naps, safe chews for the gums, and a pen or leash so nobody has to stand there being grabbed. Our how-to guide on puppy biting covers the method. If you want help applying it, Private Training at $150 works on it in your home with a written weekly plan. Puppy Fundamentals, a 3-week board and train at $2,775, covers crate comfort, routine and socialization. The consultation points you to the smaller option if it will do.
Asked and answered
The questions people ask us.
Why does my puppy bite me more than anyone else?
Often the person who moves the most, plays the most or is home in the evening becomes the favourite target. It is usually about opportunity and excitement, not dislike.
Is my puppy biting because of teething?
Teething is one common driver, especially when the biting is slow and chewy and the puppy wants to gnaw on everything. Play and overtiredness often overlap with it, so look at the timing and body language too.
Why does my puppy bite more at night?
Evening biting frequently means the puppy is overtired and short on sleep. Many young puppies need a lot more rest than owners expect, and a calm nap often does more than another play session.
When is puppy biting a sign of aggression?
Stiffening, freezing, hard staring or growling before a bite, especially around food, toys or handling, is different from play. That pattern deserves a vet check and a professional assessment rather than guesswork.
Keep reading
Make sense of the mouthing
Tell us when and how your puppy bites. We will help you sort teething from play from overtired. Book a consultation.
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