By Glenda Pereira, Ph.D., Assistant Professor, and Extension Dairy Specialist, University of Maine Cooperative Extension and Brad Heins, Ph.D., Associate Professor, and Dairy Specialist, University of Minnesota. For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. Introduction Do you know how your calves are performing? This