All pups bite and chew in play. Teach the pup to bite softly by loudly yelling “ouch” when he bites too hard and he will learn to bite softly. Some trainers prefer the command “no bite”. Be careful of having puppies in your face. They do not discriminate between your finger and your nose. During teething, they will chew on practically anything. Your job is to provide chew toys and praise the pup when he uses them.
Keep shoes and other unacceptable chewing objects picked up. Put Bitter Apple (available in pet stores) on phone and electric cords. Puppies, like human babies, explore their environment by putting anything and everything in their mouths. Make sure that they have a variety of safe toys to chew on.