This is known as a flea-bitten gray horse. A roan pattern, or “varnish” shows up as white hairs appearing through the base coat color of the horse. Roan horses are born with this coloring.

Twenty years later, three gray/roan horses are set to be in the Run for the Roses. Besides having a color in common, the horses are descendants of Secretariat. Sandman and Final Gambit are five ...