Gregory K. Mantz,^* Juan J. Villalba,^* Frederick D. Provenza<sup>*


*</sup>Authors are Student, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA (Mantz); and Associate Professor, juan.villalba@usu.edu (Villalba), and Emeritus Professor (Provenza), Wildland Resources Dept, Utah State University, Logan, UT 84322, USA. Funding to support authors and the research summarized in this article was provided by the Utah Agricultural Experiment Station and the Initiative for the Future of Agriculture and Food Systems, USDA (agreement no. 2001-52103-11215). This paper is published with the approval of the Director, Utah Agricultural Experiment Station, and Utah State University, as journal paper no. 8088.