Cow and Chicken - Season 4 Episode 19 Cow's Horse
Overview: Cow loves horses. While reading a book about a famous horse, Blackie, she discovers the famous horse in her front yard. Cow and Chicken then take the horse as their new friend. Cow and Chicken make sure that Blackie gets his way. Soon Mom and Dad tire living like animals and wearing horse shoes, and tell Cow and Chicken that Blackie has to go.