1. USDA/ARS Poisonous Plant Research Laboratory, 1150 East 1400 North, Logan,
Utah 84341, United States
2. Department of Biology, Indiana University, Bloomington, Indiana 47405, United
States
3. USDA/ARS Forage and Range Research Laboratory, Logan, Utah 84322, United
States
4. Veterinary Hospital, Federal University of Campina Grande (UFCG), Patos,
Paraíba 58700-000, Brazil.
5. School of Veterinary Medicine, Federal University of Pelotas, Rio Grande de Sul, 96010-900,
Brazil