You and your horse can be one with the help of Tai Chi. Have you ever seen a talented dressage rider performing an exquisite test, her seat seemingly melding with her horse's back, and his movements airy, animated, and effortless? Or, perhaps you have watched a great cutting horse at work, his direction and momentum changing on a dime as he reads his cow, his rider's body flowing fluidly above him as if they were...