The funny animal genre evolved in the 1920s and 1930s, as blackface became less socially acceptable. Early black-and-white funny animals, including Oswald the Lucky Rabbit, Mickey Mouse (perhaps the most enduring of the kind), Foxy the Fox, Felix the Cat and Flip the Frog, maintained certain aspects of the blackface design, including (especially with the advent of sound film) heavy emphasis on song and dance routines.
oh. hmm. huh