He is first seen at the Quahog pet shop when he asked Peter if he was looking for a dog. Winning him over with telling him about what he does, the Griffins decide to adopt him. However, the only member of the family who didn't like him was Stewie, that was, until Vinny informed him that he used to be owned by an old man named Leo before he died, and even at the pet shop, felt a kinship with the family. With that, Stewie and Vinny become friends.
At the end of the episode, he sleeping in Stewie's room.
He will return if confirmed or not.