I have a friend who owns a younger horse, 6-8 and she had been having leg issues where she would limp really bad, later finding out arthritis and foundering as well. but when I watched her lesson after my lesson I saw she was limping REALLY bad and shes jumping her like 2'6 which I know isn't high, but I cant believe the instructor and her made her jump it you can tell it hurt her every jump. At one point she bucked and wouldnt jump so the rider beat her horse with the crop. I pointed this to her and she said "No that never happened" Im sure she wasnt aware cause all she thinks about is jumping. I really feel bad for this horse cause she has hoof problems too where they dont care for them like they should. If that was my horse, I wouldnt be jumping and just doing some trails instead. Like I know it's not starving a horse or beating it till its black and blue, but I really think this is a form of horse abuse. and if she keeps jumping it I know this young horse wont last long. - shes already starting to pop her shoulder funny when walking.