Took Maxen to get his shots on Saturday and he threw up at home about an hour later.  He just seemed very groggy and not like himself for the rest of the day.  Sunday, our niece came over and he was his usual playful self, ran around with her and ate his two meals that day with no problem.  This morning I fed him and he threw it up about 15 minutes later.  I called the vet and they said that the…