Chaplin

Chaplin is Sandra Martin's horse.

Sandra goes to Amy to get Chaplin used to new riders and re-home him. Amy learns that Chaplin was a trick riding horse and Sandra refuses to listen. Eventually Amy learns that Sandra's sister, her double act, died a few years earlier and she hasn't ridden since. She convinces her to ride again and she takes Chaplin back home.

A few years later Sandra is teaching trick riding lessons, and Chaplin is the favourite to be ridden. Sandra takes him back to Amy as he has started to act up in practice and cuts through the ribbon rather than goes round the ring. Amy figures out that he needs some variety in his training and can't just train trick riding all the time. Sandra starts switching up his training.