There was an article in our paper yesterday about Native Dancer and his bloodline. Every horse in the Derby was a descendant of this horse, including Eight Belles.

These two paragraphs tell it all.

How one stallion gained so much influence over the sport is a story about market forces, genetics and in some cases greed. His bloodline's greatest asset is that it consistently produces precocious, speedy thoroughbreds that dominate the Derby and other Triple Crown events -- giving owners a safer return on their investments. But that success has led breeders to mate Native Dancer's progeny so often that the thoroughbred gene pool has shrunk. And as it shrinks, another trait of the Native Dancer line is becoming more pronounced.

Like hemophilia in the Russian royal family, Native Dancer's line has a tragic flaw. Thanks in part to heavily muscled legs and a violent, herky-jerky running style, Native Dancer and his descendants have had trouble with their feet. Injuries have cut short the careers of several of his most famous kin, most notably Barbaro, a great-great-great-grandson who was injured during the Preakness Stakes and was later put to death.

For anyone interested in reading the entire article, Here it is. Lengthy but very interesting.