After spending many years helping to teach incarcerated inmates life skills and equine care, a lot of 10 retired Thoroughbreds boarded a van July 23 bound for Pasture of Point Lookout, a Chadds Ford, Pennsylvania-based sanctuary farm founded by world-renowned artist Jamie Wyeth in memory of his late wife Phyllis. On the anniversary of her passing Mr. Wyeth turned to longtime friends, Graham and Anita Motion of Herringswell Stables. "To honor my late wife, Phyllis Mills Wyeth and her Belmont Stakes winner Union Rags, I am transforming our farm into...