I took Bosco to the vet today for his 8-week shots. The receipt says Drontal Plus, Distemper/Parvo/Corona. I am assuming those are the shots he got? Anyway, he got a clean bill of health but now that he is home he is scooting his butt across the carpet. Why is this? I heard dogs do this if they have worms but are there any other reasons? Could his shot have made this happen? Should I call the vet?