Join Date: Apr 2010
Location: ~*~ NEBRASKA ~*~
I have been on both ends of this spectrum. I have had others ride Cinny, and I am currently rider another person's horse.
As the owner, I think you have every right to watch at least the first time, if not every once in a while, so that you know your horse is in safe hands. It is also okay to let them know a few ground rules if there are things you absolutely do not want done (example you only want certain tack used, no whips, etc), but make sure they are reasonable rules and be careful of going overboard. Talking to their trainer can also help you with this. But remember that another rider will be VERY nervous having you watch. You can reassure them by telling them to go ahead and treat the horse as they would their own, make corrections the same way (within your any rules you had previously set of course) and that you are only there to observe not "nit pick" their riding. If you see something you don't like during this ride, try to refrain from yelling it across the arena as this can unsettle them. Instead ask them to come over and then politely ask them not to do that thing but tell them the alternative way to correct whatever it was they were trying to correct. Or if their trainer is there, maybe let them know that you didn't like it and ask them to have their student make a change. Also it is good to offer help by letting them know if they have any questions or want to know how YOU respond to a certain behavior or how you would correct certain things, that you would be more than help them out so that they know what the horse understands.
This can actually go pretty smoothly with a good open line of communication between all involved.