To raise an apartment dog who is people-friendly your puppy should be socialized with 100 different people before he is 3 month old! You can accomplish part of his socialization through puppy parties and play dates. He needs to meet adult women and men; boys and girls; familiar and unfamiliar people. Try introducing him to the mailman next time your mail is delivered or invite the neighbors over for dinner. Friendly, well-behaved dogs make the best apartment dogs.