Gift Horse (S02E03)

When Tim gives Amy a beautiful Grand Prix jumper for her birthday, she's forced to make a difficult choice between a career in show jumping and her work at Heartland. The intense training hours, and Tim's constant pushing, prove to be too much and before long, her school work is suffering. Caleb tries to impress his hero, Tim, by pushing his horse to the limit and tragically injures Shorty in the process. (iTunes)