Horse owner Dr. Erin Christopher-Sisk began practicing equine-assisted therapy with two of her own racehorses after they suffered career-ending injuries. (Dori Fitzpatrick) The Saratoga Farm That’s Helping Both Horses and Humans Retired racehorses get a second career with Therapeutic Horses of Saratoga, which brings equine therapy to our community’s most vulnerable. The 27 acres of farmland owned by Therapeutic Horses of Saratoga (THS) are alive with…