Les Chiens et ses services

We see a working dog, a beggar's dog, a shepherd's dog, and a milkman's dog. The working dog is locked inside a large wire wheel; the dog runs inside the wheel, turning it to run a machine. The beggar's dog pulls its legless master, who's sitting on a low cart, down the street. The shepherd's dog keeps a flock of at least 20 sheep in a tight circle. The milkman's dog pulls a cart on which is mounted a large cylinder of milk... (imdb)