Unnatural Ability: The History of Performance-Enhancing Drugs in Thoroughbred Racing

In a mere twelve months, between May 2020 and May 2021, horse racing's most recognizable face—Hall of Fame trainer Bob Baffert—had five horses that failed postrace drug tests. Among those was the 2021 Kentucky Derby winner, Medina Spirit. While the incident was a major scandal in the Thoroughbred racing world, it was only the latest in a series of drug-related infractions among elite athletes. Stories about systemic rule-breaking and "doping culture"—both human and equine—have put world-cla...