Mustang, a valuable champion bull, is rushed to the teaching hospital after he collapses in pain. The vet students undertake the dangerous process of diagnosing the enormous animal's digestive problems and get him back in shape for a major competition. A miniature dachshund puppy undergoes surgery to correct a deformed leg. A family must deal with the deteriorating health of their elderly cat, which is traced to its failing kidneys. A California King snake is brought in for treatment after it seriously burned its tail.