Heartland (2007)

Season 3: Episode 13

Relationships are on shaky ground when Kit's horse, Daisy, comes down with Strangles and are put under quarantine. Kit decides to stay at Heartland to be with her horse. But Amy loses it when she finds out that Kit brought Daisy to Heartland almost straight after a rodeo where many horses had come down with strangles! Pegasus catches it and that brings mixed feelings, especially for Tim.