Jackie Cross of Maryland wrote me a few weeks ago to tell me about her 14-year-old cousin, Gabby Gordon, who recently adopted a retired Thoroughbred racehorse named Felicity. The 9-year-old daughter of Tarakam, who raced under the name Susies Cameo Girl, made 48 starts on the Texas circuit, winning seven times, with seven seconds, and six thirds. Throughout her four-year career, Felicity consistently...