It was included on a UAV tape of OLD MACDONALD (1946). It is one of the last Famous cartoons to have realistic backgrounds. I loved this cartoon when I was little.
Another favorite is from another studio. It's a WB Merrie Melodies cartoon based on a Dr. Seuss tale I saw on a Random House video when I was little. Sure it doesn't fit the blog's name, but it's a cute cartoon with the combination of 2 distinctive things- Looney Tunes' non-violent gags and Thedore's ryming.