It's spring, the busiest time of year at the clinic. In order to keep things on track, Dr. Pol and his team have decided it is time to search for another veterinarian. Dr. Pol, his son Charles and a student from Iowa State who is shadowing Dr. Pol for the day head out to check on a downed cow at a nearby farm. After injecting the cow with calcium and phosphorus, the three go to a local breeder and trainer of racehorses to ensure that his animals are in good health for breeding.