Fiddle: Mess around with (verb) Amy fiddled around with the piece of paper in her pocket.
His name is Spartan and I like you to have him and fix him.
Rehabilitated: (verb) to restore back to health, or normal "Scott had gelded him once it looked like he was going to recover and would be coming to Heartland to be rehabilitated and then rehomed."
Scott gives Spartan to Amy right as Ty, the new stable hand, shows up.
Lou's boyfriend, Carl, comes to Heartland messing everything up, while Lou is trying to get on the business side of Heartland. He wants her to return to New York with him. Amy does not want her to leave, she is devastated, but Lou ends up dumping Carl and staying. This makes the whole family suffer because they think Lou will be leaving them and will struggle at Heartland.
Relent: (verb) changing your/their mind "However, whenever it came time for him to go back to Manhattan, Amy noticed that she had begun to relent."
Amy trains Spartan to jump for the jumping show coming up soon and Ty helps them.
Ty and Amy are at the show and another rider, Hannah, claims that they have her horse. Hannah ends up jumping Spartan in the arena and after the horse jumping show. Hannah takes Spartan home and keeps him.
Equitation: (noun) practice of horse back riding "Amy didn't compete in equitation herself; she preferred the hunter division..."