Hiya, I am desparately seeking more info on a diagnosis my horse has received today. My new horse is 3 mos. Under saddle. He is being trained as an class A show horse in western pleasure. Recently his behavior changed. I assumed it was stress due to his new training, made a decision to put him in a natural ground training program that might teach better ground manners, taking focus off his show training. Upon farrier inspection, a visible 2-3 inch ht. Between his rt and left hip was noted. Hip, lumbar spine, and stifle pain was noted as well. However, any relation to his hooves was ruled out. Upon veterinary and chiropractic inspection today, a chiropractic treatment was performed. The chiropractor indicated that my horse is experiencing tremendous pain related to muscular atrophy in and near his stifles. <I have noted how narrow he is in the rear, but assumed it was his age. (3)> This atrophy is causing a constant state of extension. (?or was it flexion?) He is basically stuck in the collected rear end tuck expected of a western pleasure show horse. They have recommended physical therapy, monthly chiropractics, and strength training. I have called a different vet and massage therapist for a second opinion. But in the mean time, would love to hear if anyone else out there has had a similar problem, and can offer any insight. Also, can this or similar disorders be genetic? It has come to my attention that my horse's sire is now lame due to a "blown stifle(s)" What is that?