Coco had to go to the vet again to get another puppy shot. I will only allow them to give him one at a time. He is so little and not that I don't trust the vet, I do, however, if he had a reaction to one of the immunizations and he had gotten more than one we wouldn't know which one upset his system. I don't mind taking him back several times. They don't charge me any extra for doing the immunizations one at a time. He didn't like this one any better than the first one! Poor little guy!