4 steps to curb puppy biting. Much like babies, young puppies learn a lot through exploring the world with their mouths. It is no biological accident that their teeth are razor sharp! Puppies need to learn “bite inhibition” or how to control the force of their bite, and since their jaws are underdeveloped, it is important that their teeth are sharp enough to inflict pain. Yes, the biting is supposed to hurt. This is to ensure that they get immediate feedback from their playmate on what pressure is too much pressure, so that when their jaws fully develop they know how to control their power and prevent harm.