I would not because coon footed means that the horses foot is hyper flexing all the time. This weakens the tendons which causes the horse to strain his/hers entire leg when jumping because they push off of their hind legs. Injury to sesamoid bones is likely of the horse is jumped or pushed too much. I would stick to pleasure riding or equitation.
Hope this helps!
I would not, you already have strain in placed there should not be strain which means a better percentage for injury in any sport you would want to ride her in. Plus the fetlock would be scraping the ground on take off/landing which would mean putting skid boots on both front and hind for protection from that but you would still have the damage of concussive force