Here's a little bit of trivia about the Cawstone (sic) Ostrich Farm shown in the cartoon. It's a reference to Cawston Ostrich Farm, which formerly operated in South Pasadena, CA. It opened in 1896, supplying feathers for ladies' hats and clothing. In time, the farm began offering ostrich rides to visitors, and became a major Southern California tourist attraction until it closed in 1935. Guests could also observe baby ostriches there, which may have inspired the ostrich character in the cartoon.
At a college lecture engagement in 1976, I heard Mel Blanc claim that he "created" (his emphasis) the voice of Foghorn Leghorn on a visit to Kentucky, while listening to a tobacco auctioneer. The truth, of course, was that Blanc was imitating Senator Claghorn, a character on radio's Fred Allen Show, voiced by Kenny Delmar. I guess Blanc figured that college kids of that era were too young to have listened to radio.