>> shirreffs: well, i...skin disease-- she had a form of ringworm-- so she wasn't particularly attractive at the sale. >> simon: she had a rash? >> shirreffs: had a rash, yeah. >> simon: so, it's been from rash to riches? >> shirreffs: ( laughs ) yeah. yeah. >> simon: i don't quite believe i said that. under john shirreffs' tutelage, zenyatta has won more than $6 million. but she was a late starter, not ready and too immature, shirreffs thought, to run in the big races when she was a little kid. when she was three years old, why didn't you race her in the kentucky derby? >> shirreffs: you know, she wasn't... as a three year old, she... she wasn't ready to race. you know, it took her a long time to... to mature in... into the horse she is now. and we just had to be patient with her. >> simon: shirreffs gave zenyatta time to grow up, and he insisted on doing it at his own pace, without ever losing his temper. he thinks horses know when people are tense, and they don't like it. we spent nearly a week with zenyat