I don't show at all, but I found it so surprising that riders would be asked to give their horse to someone else. Is this common?
What would happen if there was a terrible accident with another rider on your horse? Is that just a risk that's a given and agreed to ahead of time? If your horse doesn't go as well with another rider, is that held against your horse?
I guess maybe this is commonplace and I've just never seen it, but that just seemed like such a strange twist at the end of a show to me.