S5·E2 Dog Dilemma

When Sarah gets a new dog, Caillou is actually a little jealous. All Sarah wants to do is play with her new pup! Caillou feels a little annoyed with the dog... until he dog-sits for an afternoon and realizes Sarahs dog is actually pretty great. He and Sarah talk about their feelings, and they decide itd be fun for all of them to play together.