The Addams Family: The Animated Series
The Addams Family At the Kentucky Derby
S1 E16:
Pugsley wants a horse for his birthday, so the Addams Family goes to Kentucky to buy one. The Addams choose a worn out old nag called Bones, but Granny's cooking does him so much good that he becomes a fast runner again and, ridden by Pugsley, wins the famous Kentucky Derby!