When puppies play with each other, they use their mouths. Therefore, puppies usually want to bite or “mouth” hands during play or when being petted. With puppies, this is rarely aggressive behavior in which the intent is to do harm. Because puppies are highly motivated to exhibit this type of behavior, attempts to suppress it or stop it are unlikely to be successful unless you give your puppy an alternative behavior. The goals of working with this normal puppy behavior are to redirect your puppy’s desire to put something in her mouth onto acceptable chew toys and to teach her to be gentle when a hand is in her mouth.