When the eggs begin to hatch, Papa Rooster starts training his little fighters for the big bantamweight match. All the chicks look tough - except for one "mama's boy." Pop tries to forget about him, but when the chips are down, and all the other chicks have been knocked out, "mama's boy" comes to the rescue. The little rooster is thrown into a cockfight (the Golden Spur Tournament for Junior Bantam Weights) after The Champ wipes out a challenger. The runt of the group wins the fight.
Due to Disney's high volume of cartoon production, the studio got a little ahead of itself. Disney contracted out the production of three Silly Symphonies shorts - "Merbabies", "Pipe Dreams", and "The Little Bantamweight" - to Hugh Harman and Rudolf Ising. Of the three, Disney only kept one ("Merbabies"), with the other two being sent to MGM, who released them as Happy Harmonies cartoons.
This is the latest-released short in the Happy Harmonies series. The reason for the end of the series was because the shorts were too expensive to produce, going far over the budget, as these had new musical scores to compose, were long in duration, and were produced in 3-color Technicolor, all the while the Great Depression was going on. Obvious to the fact that the studio was losing money, Metro-Goldwyn-Mayer terminated their contract with Hugh Harman and Rudolf Ising, as they subcontracted Harman and Ising to produce cartoons for them. Shortly after their termination, Fred Quimby, producer for the first 96 Tom and Jerry cartoons and others, rehired them back, this time to the real studio, during World War II, though they worked separately until they reunited in the 1950's under another studio.
Like most Happy Harmonies cartoons, the cartoon is available on YouTube without copyright protection.