ASCOT, UK -- Six months ago David Howden was in the winner's enclosure celebrating success at Royal Ascot with his G2 Duke of Cambridge Stakes winner Running Lion (GB) (Roaring Lion). On Friday the owner-breeder was back at the racecourse to espouse his passion for sport horses, and more specifically how racehorses can be retrained for other disciplines. Howden's principal interest in horses came through eventing. He hosts Cornbury Horse Trials at his Oxfordshire home every September and his daughter Jemima is one of the rising stars of the young...