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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.