Somewhere around week three of owning a puppy, most new owners say the same thing with the same slightly desperate look: why won't they just stop biting?
The short answer is that they physically can't. And knowing that changes how you respond to it.
Why Puppies Bite
Mouthing is not bad behaviour. It is a normal developmental phase driven by teething, exploration and a brain that has not yet developed the ability to self-regulate. The part of the brain responsible for impulse control is not functional until around six months of age. Until then, your puppy is running almost entirely on instinct and sensory input.
They are not trying to hurt you. They are just doing what puppies do.
What Makes It Worse
A few common responses actively backfire.
Yelping or saying "ouch" is one of the most widely given pieces of advice for puppy biting, and for many puppies it makes things significantly worse. High-pitched sounds can trigger play drive, making your reaction sound like exciting prey noise and ramping up arousal in a puppy who is already wound up.
Wrestling with your puppy or letting them mouth your hands teaches them that hands are toys. Once that association forms it takes a long time to undo. Hands should always be for calm, gentle, positive things. Play that involves teeth belongs with a toy, a rope or a chew.
Over-tiredness is also a major trigger that gets overlooked. Young puppies need between sixteen and eighteen hours of sleep a day and cannot self-regulate. Before you try to correct a biting puppy, ask yourself when they last slept. If it has been more than an hour or two of awake time, the answer probably is not more training. It is a nap.
What Actually Works
Go completely still and boring. No eye contact, no reaction, no noise. Remove the fun entirely and most puppies disengage within seconds. The game only works if you are playing it.
Redirection is more effective than correction at this age. Scattering a few small treats on the floor for your puppy to sniff out takes their nose and teeth away from your hands and genuinely tires a puppy brain. Short scent-based activities before the predictable bitey window hits can head the behaviour off before it starts rather than trying to manage it once it is already happening.
Protect their sleep. Manage the environment. Finish every training session on a win.
When Does It End
Most puppies come through the mouthing phase naturally around five to six months as the brain matures and impulse control starts to come online. Physical punishments like squeezing a puppy's mouth shut or tapping their nose range from ineffective to counterproductive and research has consistently shown they can create fear and defensiveness that leads to worse biting, not less.
