How Long Is “Tom Tinker's Pony Patter”?

Camera iris opens to six ponies with decorated harnesses and plumed halters, standing in the center of a stage with a painted backdrop of mountains. Cuts to two ponies on a seesaw, with a moustached man in a white uniform with dark piping and a white cap holding their leads. A second trainer in a dark suit can also be seen occasionally with the ponies. Individual ponies perform a variety of tricks, including rolling a slatted barrel across the stage with front legs and then with a nose, knocking over the barrel, "limping" across the stage with one front leg held off the ground, and pushing the trainer over with a nose-butt.