It would be virtually impossible for a broodmare to have two Kentucky Derby starters in the same year; the race is, of course, only for 3-year-olds, and surviving, thriving twins are rare in horses. But the pensioned broodmare Darling My Darling has found a way to get her name into this year’s lineup twice. Two of the mare’s daughters have foals in the race, represented by Sierra Leone and Forever Young.