The cart horse has gone the way of the dodo in much of the world, though if gas prices keep going up, they might come back. Here we still depend on horsepower. To provide traction on the asphalt the cart horses are given hoof pads made of old car tires. This is the hoof of a mule that a friend of mine bought from a carter and it shows how they do it. Hang on to the photo...it could come in handy.