Voted from a pound. He's already on record as saying that his family will adopt a dog.

HSUS statement

I hope this isn't one of the first campaign promise he breaks.

EDIT: Puppies can be gotten from the shelter, they just go very quickly. Usually you have to have go to the shelter early in the morning, or if your local shelter allows it, you can put your name on a list for a specific age/breed of dog.