So far this isn't something I have had to deal with myself, my son has taken a few falls but it hasn't put him off. But a good friend of mine went through it last year. Her daughter (9 years old) had taken a bad fall and wanted "out". She told her daughter it was fine if she didn't want to ride any more and she wouldn't make her, but she told her daughter that she had bought and owned a horse and was therefore committed to the horse. She made her daughter take on the responsibility of all the daily chores of the horse, including feeding, grooming, and stall cleaning. When her daughter complained about the work her mother reminded her that the "payment" for all this work was getting to ride, that was what made owning a horse worth it, and sympathized with her that when you just have to do all the work and not get any of the riding, that owning a horse wasn't as much fun. But she kept telling her daughter they would not just "get rid" of the horse, that she didn't believe horses were disposable commodities. It wasn't long at all before the daughter wanted to get the "fun" out of riding again - her mother started slow, didn't push her to show or compete, and just let her trail ride, and soon the daughter was back into riding full force.