1. 1Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, Illinois, USA
2. 2Department of Veterinary Medicine, Sousa Campus, Federal Institute of Education, Science and Technology of Paraíba, Sousa, Paraíba, Brazil
3. 3Instituto Nacional de Investigación Agropecuaria, Estación Experimental INIA La Estanzuela, Colonia, Uruguay