Bridgett J. McIntosh, Virginia Tech, 20942 Willisville Rd, Bluemont, VA 20135, Ozzie A. Abaye, Crop & Soil Environmental Sciences, Virginia Tech, 245 Smyth Hall, Blacksburg, VA 24020, Ray J. Geor, Animal and Poultry Sciences, Virginia Tech, 5527 Sullivans Mill Rd, Middleburg, VA 20117, and W. Burton Staniar, Dairy and Animal Science, Penn State University, 324 Henning Building, University Park, PA 16802.