[mferg]

Yeah, jumping is pretty hard on elbows. You've got those joints taking the impact of the dog coming down on them. I think elbow problems are almost harder to deal with than hip problems - certainly where jumping is involved. If you decide to continue with the agility to any great degree, I'd suggest you radiograph her elbows, too. If you're only going to play around here and there, I'm not going to crucify you for not doing them (although others may you and me). However, keep an eye out for any tenderness, soreness, lameness, etc, that may be an indicator of elbow problems. (That should be a standard practice anyway.)

If you find that she does have elbow problems, you can still do limited jumping if you are very concientious of how many, how high, and how often. Also, you will want to keep her good and lean (sounds like you already do) and keep her as well muscled as you can without overtaxing the poor joints. Swimming is a good choice. Agility probably wouldn't be a good choice of activities, but you can still do some obedience, tracking and other stuff. You don't need to to lots and lots of jumping in obedience: Just be sure she is familiar with jumping full height, but only sporadically practice jumping and use lower heights most of the time.