Bree started out as a young rider, lending a horse to participate in competitions. They did very well together, but then the horse had an Injury, and Bree was left without a horse. She was just out of University and in need of a horse. Heather, or current rider at the time, was pregnant, so Bree and her brother applied for the job as a rider, here at PSH, and they both got hired.
Bree has really bonded with Crixus, they are so good together, that Bree has been set as his rider. Heather used to be his rider, but she didn't want to break them apart.