Shoeless Thoroughbred Wins at Keeneland; Track Lists Barefoot Entries as Trainers Experiment with Polytrack Surface Effects on Hoof Slide

The racing surface known as "Polytrack" is one of several artificial surfaces that have been installed at racetracks in North America to improve safety and help cope with bad weather. But it also changes the way the hoof interacts with the surface. The characteristic slide that horses experience on dirt can be "sticky" for some horses. Experimenting with and without shoes during training and