The horse is an athlete; some are more naturally gifted than others. But the common denominator between them all, is that the musculoskeletal system, pound for pound, is their largest bodily component; over 60%! When you buy a horse, you're buying motion. When a million dollar horse no longer moves like one, he isn't one! And this is the system mainly responsible for motion. Yet it is mostly overlooked because it does not reveal itself in radiographic and other testing mediums.