By Colt W. Knight, Ph.D., Assistant Extension Professor and State Livestock Specialist, University of Maine Cooperative Extension. Reviewed by Gregg Rentfrow, Ph.D., Associate Extension Professor, Meat Science Specialist, University of Kentucky For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. With recent challenges to the meat