1. Department of Clinic and Surgery, Veterinary School, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
2. Department of Veterinary, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brazil
3. Department of Animal Science, College of Food, Agriculture and Environmental Sciences, Ohio State University, Columbus, OH 43210, USA
4. Department of Preventive Veterinary Medicine, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil