Part 1: Seven-time Olympian Phillip Dutton schools a group of top riders on their first cross-country school of the spring. The three horses are quite different, and his advice is specific to each. One horse becomes heavy the longer the horse goes, one is very experienced and doesn’t need to jump an excessive number of fences, and one puts the emphasis on rider position and keeping the rhythm. They school roll tops, ditches, mounds and corners.