Mr. Kibbles was a talking cat that played in Werewolf Game 9. For some reason Brett hates Mr. Kibbles and thinks he is a whore. Mr. Kibbles died during the Werewolf game.
Mr. Kibbles and Peepers had been friends despite the fact that chickens and cats have bad time together. During Werewolf Game 9 Peepers got killed by Mr. Kibbles who was the werewolf. Distraught from killing his best friend, he killed himself so that they could be friends in animal heaven.