Gallopin' Gals (1940)

Time for the big horse race. We drop in on the fillies, who gossip in New York accents. That's followed by a pre-race fashion parade. In both of these, Maggie doesn't join in; she runs every year, but suffers from hay fever. The actual race is run, and Maggie is far back in the field. The other horses hear it's going to be a photo finish, though, and they all come to an abrupt stop and pose except Maggie, who keeps running and wins the race.

Unfortunately the movie Gallopin' Gals is not yet available on HBO Max.