Playful that they are, it's natural for puppies to be mischievous ... to bite your hands and legs ... to nip and 'mouth' you. This is not really serious initially, but if it continues in the future, this 'playful' behavior can cause harm to you or your loved ones. It is therefore, very important to teach your puppy to refrain from biting. You need to teach it to control its jaws. It should be taught to think before it bites, so that in the future, it does not indulge in the same.