A puppy's growth cycle includes a "critical period" that
begins at about two months of age and ends sometime between
six to eight months. During this window, puppies socialize easily
ability to accept new and initially frightening things.
Allowing your puppy to experience many new people, dogs, sounds and
events is so important. Ideally, your puppy should interact with a
people and 50 to 100 dogs by the time it is eight months old.