1. Department of Animal Science, Texas A&M University and Texas A&M AgriLife Research , College Station, TX 77843 , USA
2. School of Agricultural Sciences, Sam Houston State University , Huntsville, TX 77340 , USA
3. Department of Large Animal Clinical Sciences, Texas A&M University , College Station, TX 77843 , USA
4. Department of Animal and Range Sciences, Montana State University , Bozeman, MT 59717 , USA
5. Department of Animal Sciences, North Dakota State University , Fargo, ND 58102 , USA
6. Department of Veterinary Clinical Sciences, Oklahoma State University , Stillwater, OK 74078 , USA