1. Departments of Animal and Dairy Science (H.Q., M.J.A., D.L.H., C.A.B.), University of Georgia, Livestock—Poultry Building, Athens, Georgia 30602
2. Food and Nutrition (H.Q., D.L.H., C.A.B.), University of Georgia, Livestock—Poultry Building, Athens, Georgia 30602
3. Poultry Science (M.M.C.), University of Georgia, Livestock—Poultry Building, Athens, Georgia 30602
4. T he USDA-ARS Russell Laboratories (G.J.H.), Russell Research Center, Athens, Georgia 30605