Apocalypse Cow
Bart gets stuck with a weaker cow and can not trade it away. He meets Mary, who gets Bart to not give up on the competition. Through the competition, Bart takes good care of the cow, which he names Lou, and makes him stronger and starts loving him. At the judging, Lou has grown up into a bull and is given a blue ribbon as an award. Bart is very happy until Lisa tells him that Lou will then be sent to a slaughterhouse.