Sports Illustrated Top 10 Female Race Horses of All Time: #1 is Zenyatta (b.2004) Zenyatta also had a near-perfect racing record of 19 wins in 20 starts (20:19-1-0) and was named the American Champion Older Female Horse 2008, 2009 and 2010 and was American Horse of the Year in 2010. Zenyatta was the first female horse to win the Breeder's Cup Classic, and is considered to be one of the greatest racehorses of all-time.
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