There's little doubt that 3-year-olds Drain the Clock (Maclean's Music), Fire At Will (Declaration of War) and Prime Factor (Quality Road) are talented individuals. But whether or not they are legitimate contenders for the GI Kentucky Derby is a question each one will have to answer in Saturday's GII Fasig-Tipton Fountain of Youth S. at Gulfstream Park. The mile-and-a-sixteenth Fountain of Youth, which drew a field of 10, has a clear favorite in Greatest Honour (Tapit), the Shug McGaughey-trained winner of the GIII Holy Bull S. But whether or not...