Bringing home a fresh puppy is a bundle of fun. Puppy socialization is the most important thing you need to concentrate on before your puppy reaches the age of 12 weeks. This puppy socialization period is recognized as the 'windowpane of opportunity' because it is the time period when young puppies learn best how to handle the mysterious. Therefore, the more people, puppies, objects, sounds and conditions the puppy dog can come in contact with during this period, the better. Puppy socialization to these new encounters helps the doggy to be much more confident as an older dog when put through unfamiliar events.
Puppy preschool or kindergarten is a great avenue for socialization with other young puppies of a similar age group. However, the turmoil arises from the question of dog vaccinations "is it safe to have a puppy out during this time period?" This is a problem because on the one hands you want to teach your pup to be sociable but keep the puppy safe at the same time.