How to stop puppy biting and teach a gentle mouth

Step by step

1. Meet the basics first: regular naps (young puppies sleep around 18 hours a day and overtired puppies mouth more), meals, potty breaks, play and short training games through the day. ^2,3,4,5,7
2. Keep legal chew outlets everywhere: three or four rotated toys and age-appropriate chews in each room and in your pocket. Offer one before the puppy starts (bouncing, pouncing, out of the crate, at greetings). ^3,4,6,7,8
3. Redirect: when teeth touch you, keep your hand or feet still (pulling away turns it into a game), then animate a toy along the floor so the puppy grabs that instead; praise and play with the toy. ^2,3,5,7,8
4. If the puppy bites hard or keeps going, calmly end the fun: stand still, fold your arms and turn away for a few seconds; if it continues, step behind a baby gate or door for about 30 seconds to a minute, then come back and restart gentle play. Some trainers add a short 'ouch' first; skip it if it winds your puppy up. ^{1,2,3,4,5,6,7,8}
5. Teach a soft mouth and an 'off': hand-feed some of the food and reward gentle taking; say 'off', wait for one second of not touching the treat, then 'take it', and build to longer waits. Ask for a calm sit before play starts. ^1,4,5,8
6. Manage so mistakes are rare: a play-pen or baby gates when you cannot supervise, a light house-line on the harness when you are there so you can calmly lead the puppy to a short break, and no rough hand-wrestling or waving fingers and toes. ^3,5,6,7,8
7. Children and visitors: always supervise. Children should not have to handle the mouthing themselves; ask them to move slowly and stay calm while an adult redirects, and use a gate when you cannot watch. ^3,4,5,7

When to move to the next step

• Tighten one level at a time: first no painful bites, then end play for moderately hard bites, then for any teeth on skin (Dunbar aims for no pressure by about 4.5 months)¹
• Move on when, in most play sessions, your puppy grabs the offered toy or sits instead of grabbing hands, and lets go within a few seconds of 'off'^1,4

Difficulty by age

Difficulty is on a 1-5 scale, estimated for 50 breed and mixed-breed size profiles. Breed adjustments are generalisations capped at ±1 level, because breed explains only about 9% of behavioural variation; your individual dog matters more.¹⁰

What changes at this age

• Puppy: Mouthing is normal at this age and baby teeth start falling out around 12 weeks; focus on naps, chews and ending play after hard bites. Dunbar aims for no painful bites by about 3 months.^1,3,12
• Adolescent: Most puppies mouth much less once adult teeth are in, around 6-7 months. If hard biting is not improving by about 6 months, or comes back after improving, see your vet (pain) and a qualified trainer or behaviourist.^2,3,4,12
• Adult: Adult mouthing is usually a habit left over from puppyhood and can still be retrained, with more management because adult jaws can hurt. Hard bites, a stiff body, growling or bared teeth need a vet and a qualified behaviourist, not this plan.^3,8
• Senior: New or increased mouthing or biting in an older dog: vet check first, pain is a common hidden cause.^3,9

Breed and body-type cautions

Rows where our matrix says “not recommended”, or where a sourced physical or welfare limit applies. For these dogs the free plan proposes a safer alternative.

Common mistakes

• Pulling hands, feet or clothes away fast, or running off: it turns mouthing into a chase game^3,7,8
• Punishing: shouting, tapping the nose, holding the mouth shut or scruff shaking can make biting harder and teach fear^3,5,8,11
• Rough hand-wrestling or waving fingers in the puppy's face^3,5,8
• Reading an overtired puppy as one that needs more exercise^3,4
• Different rules from different family members^3,5

Troubleshooting

• Yelping or 'ouch' makes him wilder: drop it and go straight to quietly ending play^2,4,7
• Bites most at predictable times (out of the crate, at greetings, after exciting play): have a toy ready before then, and offer a chew in the pen for a nap^3,4,7
• Grabs feet and trouser legs as you walk: stop moving, wave a tug toy, move again once he holds the toy; a treat held by your leg also helps^2,3,8
• Mouths when stroked or groomed: feed small treats from the other hand while you touch gently^4,8

Where the sources disagree

Support is the share of the weighted sources that took a stance on the question.

Known gaps in the evidence

• No controlled study compares a yelp with a silent time-out; sources disagree (see below)
• Ages for when mouthing fades come from expert and vet guidance, not trials; puppies vary
• This routine cannot assess aggression: biting with fear, guarding or injury needs a professional

Related skills

• Calm / off switch
• Crate & alone time
• Leave it