Instructions
Cry out when your Labrador puppy uses its mouth on you, even in play. A loud yelp teaches the dog that biting hurts.
Move away from your dog after it uses its mouth in play. Removing yourself from the situation takes the fun and play away from the puppy and reinforces the idea that biting or using its mouth was inappropriate.
Take your puppy to dog parks and other places where it can come into contact with other dogs in a safe and controlled environment. This socialization provides invaluable lessons for your puppy about appropriate play and behavior.
Provide chew toys for your dog. Puppies will bite and chew when they're teething, so provide appropriate toys for your puppy to chew to relieve the pain and discomfort of teething.
How to Stop a Labrador Puppy from Biting
A Labrador puppy learns acceptable behavior from trial and error, from its littermates and other puppies, and from its mother (if the puppy remains in the litter long enough). When a Labrador puppy leaves the litter and joins a new family, it learns about acceptable and unacceptable behavior from its new owner. The Dog Breed Info website emphasizes that any biting, no matter how cute or playful it may seem, should be discouraged in order to help your Labrador puppy realize that biting is not acceptable behavior.