Early on in "When I Yoo Hoo" I figured out that it had a plot similar to the later "A Feud There Was", which is best known for casting Egghead as a peacemaker named Elmer Fudd. Since it was the first time that the name appeared in a cartoon, the character didn't at all resemble the famed wabbit hunter. So, in this one, a pair of hillbilly families take potshots at each other - presumably a la the Hatfields and McCoys - until they get ordered to resolve the dispute with a cockfight...which of course turns out to be a pretty outlandish boxing match.
The title of course stems from a song sung by one of the characters. It was obviously a song in the Warner Bros. archives, since all their Merrie Melodies featured WB songs until the late '30s. As for the cartoon itself, the song is the best part - there are plenty of movies whose soundtracks are easily the best part - while the boxing match is a gag-filled riot. Worth seeing. Too bad that it lost the credits in the Blue Ribbon reissue.
