The apartment glistens with the quiet discernment of its owner. Lexington spreads below the great windows and balcony, its urban grid seamed green by the many old trees that endure downtown. In somewhat the same way, amid all the artwork, the gleaming décor, Scott Heider draws on Nature to explain his love of this business. He gestures towards a rose in a vase. "That's the best analogy, you know," he says. "Beautiful, but it doesn't last forever. I look at the wonderful broodmares we've been blessed with--these living, breathing creatures--and...