Even as IOU (1942)

A destitute mother and child move into the stooge's vacant lot home and the boys decide to help them. They steal the kids piggy bank and sneak into the race track. They bet on a long shot that wins and then are gypped out of their winnings by two con men who sell them a washed up race horse. Everything turns out happily when Curly swallows horse vitamins and gives birth to a colt!