Sudden Fried Chicken (1946)

"Sudden Fried Chicken" stars Herman (a mouse) and Henry (a rooster). Herman notices a poster that will award $1,000 to anyone who will stay in the ring for one round against a champion boxing rooster. He goes to Henry, who is feeling really low about himself, as he is getting bossed and pushed around by his wife. One thing leads to another, and the scrawny Henry is going up against the Champ!