CatDog get fleas, so they have to wear an unfashionable belt. Dog refuses to wear the belt. When he does, the fleas inhabit Cat, so they fight over the belt. When the belt becomes useless, they find the fleas a new home. CatDog become famous stars with "CatDog Food". But after the fame goes to Cat's head, he gets cocky, and insults Dog. He even gains a bunch of weight. It isn't until He makes fun of Rancid Rabbit, and ruins the deal that he realises that he has made a change for the worst.