he is 1 year old, BTW a few hours after I brought him home from the Vet he threw up when I took him outside to eliminate, so far he only threw up once, the only thing they gave him at the vet was a couple treats that the tech gave him, no medication or treatments were administered there, should I be worried? The treats he ate at the Vet is a brand he has never had before. This is the first time he has ever thrown up that wasn't do to motion sickness.