1. Department of Animal Sciences, University of Illinois , Urbana, IL 61801 , USA
2. ADM , Decatur, IL 62526 , USA
3. Department of Animal Sciences, Federal University of Lavras , Minas Gerais , Brazil
4. Simmons Pet Food, Inc. , Siloam Springs, AR 72761 , USA
5. Agricultural Sciences Institute, Federal University of Minas Gerais , Minas Gerais , Brazil