LEXINGTON, Ky. - The highly public breakdowns of Barbaro and Eight Belles in the 2006 Preakness and 2008 Kentucky Derby have brought Thoroughbred racing under increased public scrutiny. Since Eight Belles's death on May 3, the public and the general media have sought to untangle the various factors in racing that might have contributed to such breakdowns among even the sport's elite athletes - and, time and again, they have pointed to Thoroughbred breeding, and particularly a focus on speed rather than soundness, as a likely culprit in breakdowns.