Unfortunately, EPM is prevalent in the equine industry and can really affect the performance of a horse if not diagnosed or treated early. This superb video with Dr. Molly Bellefeuille, Weatherford Tx, explains how to diagnose and treat this parasite that affects the central nervous system. She also explains how it can affect the mind of your horse and where muscle atrophy usually occurs the most. Molly Bellefeuille | Cutting Horse Training Online