1. USDA ARS Livestock Issues Research Unit, Lubbock, TX, USA
2. Animal and Food Sciences, Texas Tech University, Lubbock, TX, USA
3. Department of Animal Science, Texas AgriLife Research, Texas A&M University System, College Station, TX, USA
4. Brown Loam Branch Experiment Station, Mississippi State University, Raymond, MS, USA
5. Texas AgriLife Research Center, Overton, TX, USA