The purpose of this internship course is to enable students to understand the importance of ruminant health to ranching operations. For example, nutritional conditions for growth and development of ruminant, observation of body scores and behaviors, appropriate mating duration and artificial insemination, diagnosis of pregnancy and postpartum uterine involution, treatment of milking equipment and mastitis, recognition and prevention of metabolic diseases, timing of drug use and elimination mechanism, etc. Through practical operations, we will explore problems and solve problems to achieve the maximum benefits of operating and managing ruminant farms.