Short answer: puppy biting tends to intensify during 3 distinct stages — teething, socialization, and losing baby teeth — and the key to stopping it is a firm, consistent reaction: yelp "ow" and immediately end playtime the moment they bite.
What are the 3 stages when biting tends to get worse?
Around 2–3 months old when baby teeth come in, 4–6 months during the socialization period when curious nipping increases, and around 6 months when baby teeth fall out and adult teeth come in — biting tends to intensify noticeably during these three windows.
How should I react when I get bitten?
The moment you're bitten, let out a short, high-pitched "ow!" and let your hand go limp, stopping all interaction. This mirrors how littermates taught each other, and your puppy learns that "biting hard ends the fun."
Does scolding help too?
Yelling loudly or physical punishment like tapping the nose isn't recommended — it can instill fear or create a negative association with hands themselves.
How do I teach the difference between okay and not-okay biting?
Praise them when they bite a toy, and stop all interaction when they bite your hand or clothes. Repeating this consistently helps them gradually learn the distinction.
What if biting is still an issue once they're an adult dog?
If biting remains severe past this developmental window, it may not just be a normal growth phase but a separate behavioral issue — it's worth consulting a professional trainer or behaviorist.
