Ernie is a Giant Chicken with whom Peter Griffin has had a long history of violence. He often shows up in the middle of a scene and interrupts Peter and the two engage in a long, drawn out fight won always by Peter, who then returns to the scene battered and bruised and picks up where he left off, not knowing that Ernie, seemingly dead, awakens and gets up after Peter leaves, foreshadowing another future fight. Each fight also leads to serious destruction of the environment around them and heavy casualties to bystanders. The whole feud begins with Ernie giving Peter an expired coupon, as revealed in "Da Boom". However, in "Meet the Quagmires", Griffin's meddling in his past allows him to accidentally punch Ernie while dancing at Enchantment Under The Sea, giving a new birth to the rivalry, and the new reason Ernie gives him the bad coupon, and 15 more years of balled up anger.