In the first year of your puppy's life, biting and chewing is common. Teething puppies, especially, will chew and bite. However, you will need to establish boundaries on what is acceptable and what is not from the time you first bring your puppy home. Training a puppy, puppy potty training and obedience dog training is very important. Although you might think it is cute when your pup growls and bites when he is little, you won't when he is an adult. At that point, he might send someone to the hospital for stitches! For FREE classes on how to stop your puppy or dog from biting along with solving behavior problems and getting your dog obedience trained: Click Here.