WHY DOES PUPPY CHEW?
St. Hubert's Dog Training School

At three weeks of age your puppy's first set of teeth start to come in. During his third month, these small teeth begin to fall out, allowing the larger permanent teeth to come in, causing soreness, drooling and general discomfort. Your puppy will search for something to chew on during this period to relieve the soreness.

You must supervise your puppy during this period so you are ready to consistently and clearly show him what he should be chewing on. Give him indestructible chew toys to occupy his time. Avoid letting him chew on articles of clothing such as old shoes, slippers, etc. Your puppy will not know the difference between old and new clothing.

Avoid all rough play since this only teaches your puppy to be mouth oriented. You are inadvertently teaching him that it is acceptable to use his mouth in ways that are inappropriate to humans.