Zenyatta is one amazing mare. She finished her career undefeated (14-0), and in her last race overcame a bad start and went from worst to first to beat all of the boys in the $5 million Breeders' Cup Classic, which is an exceptional feat for an older female horse. It'll be interesting to see what kind of racehorses her babies will be, as many great mares on the track haven't been so fabulous in the breeding shed.