Temperatures are blazing in Michigan and there are more farm calls than ever. The heat also brings more pregnancy checks and births, leading Dr. Pol and Charles to start their day by heading out to a stable to check the status of some horses. Meanwhile, Dr. Brenda heads to a ranch to vaccinate minihorses, but instead gets some screaming and kicking. By the time she's finished, Dr. Brenda is bruised and bleeding, but she never gives up when it comes to the health of their patients.

With more than 19,000 clients, Dr. Pol is stretched to the limit. To keep up with calls, he adds Dr. Sandra to the staff. A farm girl at heart with lots of large animal experience, Dr. Sandra treats a downed horse with lesions that make it nearly impossible to stand and nurse her colt. Elsewhere, Dr. Brenda is called to treat a bloated cow in critical condition. Without treatment the cow will die, but with one simple procedure, she miraculously has him off the ground and eating in minutes.