I don't know how corrective shoes would do anything here. I assume that's what you meant by "corrective shows." A good trim yes, but not shoes unless there is something else going on.Ok, she told me he actually does have a diagnosis. Upward fixation of the patella. She is doing a round of injections(of what I don't know but am gonna see her in an hour and will ask) and going to get him corrective shows next month.
There are recommendations for physical therapy of this condition. Hopefully Vidaloco will see this thread and post -- she also has a young horse with this problem.