Unless you're a devoted horse racing fan, I doubt whether this will be of more than average interest to the viewer. Some fine points about the difference between "trotters" and "pacers" is interesting, and both kinds of harness horses are depicted doing their thing--sometimes in slow motion to better illustrate the points being made.
The short starts with the birth of a young foal who is standing on his own wobbly feet within thirty-five minutes. The care that trainers have to demonstrate in training the young horse for their ultimate destination on the racetrack is shown, as is their remarkable patience in putting the horses through their paces so that they have the "style, stamina and speed" necessary for the country fair.
Of limited appeal, and the footage is all from a 16mm print of the film in muddy color that is not in the greatest shape for showing on TCM.