My little Louie got his 2nd round of vaccines on Monday. They gave him the LEPTO vaccine, which I didn't know you shouldn't give to yorkies (my breeder said nothing about this) and today he is not himself. He ate this morning but he doesn't want to play..all he wants to do is sleep or lay down on the floor. He was fine yesterday and Monday after he got his shots, so..could this be a delayed reaction?? If there was going to be a reaction to the LEPTO would it have happened on Monday and I'm worrying for nothing??