Most new puppy owners have a single similar question about the new member of their family, "why do puppies love to bite?"
One of the puppy's most important social activity is play-biting. That's why it is essential not to take a puppy away from its litter at less than 8 weeks old as the puppy will develop most of its social traits within that span of time and the litter is a lot of help. Play-biting allows the puppy to gauge how hard it can bite without actually hurting someone else. Puppies will bite each other until one squeals in pain and stops playing their biting game, which would tell the other puppy that the bite did hurt and if that pup continues on like that, nobody will play with him anymore. This is essential as the pup will carry this learned lesson to adulthood, having gauged on how hard his jaw can bite to hurt or not to hurt someone else is a very good thing for the dog, other dogs and their humans.
Lexie and Nala are at it again
Play-biting may also be the reason why a puppy will bite on your table legs, chairs and most of your furniture, especially if the pup doesn't have someone else to play with. If your puppy starts to play-bite with you, don't push him or her off, just react in a productive way whenever his bite becomes painful by turning away from the pup and giving a high pitched squeal to indicate pain and make the pup learn its lesson. Taking your finger away and giving affection at the same time would only make them think you weren't hurt at all and that the bite the pup just gave was okay.
these pups are full of energy and could play the whole day
If you have a dog in the house, introducing a new puppy could actually initiate play-biting between the two (which is good). Don't try to stop them even if it gets a little rough, that is ofcourse you have complete confidence that your dog will not hurt the puppy. Remember, settle the issue with you and your dog/pup by yourself, be dominant -- but let the other dogs settle their issues by themselves, this will create for a natural hierarchy in your pack without any confusion.
Chuck gets in the fray, pinning Nala to the count of 3
I read a story about this very docile adult dog who's never shown any aggression in all his life, but one day while this child was playing with the dog, he was accidentally hurt and bit the child as a reaction. The puncture wounds would indicate that the dog didn't actually know how to control his jaws and that could probably indicate the dog's lack of play-biting when he was still a puppy.
Remember that playful pups, play-biting or no biting at all, does not lead to aggressive dogs. It always depends on the owner.