Headley Bell has run Nicoma Bloodstock for 40 years, planning matings for clients at his Mill Ridge Farm and beyond. "It's like being an artist," says Bell. "You're crafting, and planning matings is part of that whole creation." Bell said he uses various tools for his matings, including TDN's statistics on percentages of black type to foals, mare produce records, five-cross pedigrees, and examines patterns of broodmare sires with certain families. Finally, he takes physical traits of mares into consideration to determine, he said, "who that mare really is." He...