Jitterbug Follies (1939)

Count Screwloose and JR the Wonder Dog are promoting a 10000 swing contest They plan to skip town with the entry fees but a menacing thug from the Citizens for Fair Play convinces them otherwise The contestants A singing hippo Mother Goose who starts out as an old woman then sheds her disguise to reveal a pretty girl and a fandancing ostrich Throughout a couple of penguins are heckling The ostrich proves wildly popular and Screwloose fears hell have to give the prize to her when he gets an idea He dresses JR up as the ostrich and sends him out but the penguins use a box of sausages to expose the dog The crowd runs Screwloose and JR out and they grab a ride on a train where the penguins are waiting for them