Do her hindquarters really look like the unsaddled pic? It looks like her pelvis has rotated or something to me... She looks very week and strange through the back end, which I am hoping just how she is standing in that pic, because it doesn't look that way in the saddled picture. Do you have any photos that she doesn't have her outside hind leg way behind her?
She has an upright shoulder, is back at the knee and low neck tie in, and is more muscular through shoulders than hindquarters. I wouldn't recommend her for high impact sports because of those knees... All assuming the hindquarters are just the photo.
She's under muscled through her butt and really doesn't have a qh butt. She was in a pasture for 5 years before I got her and a bit underweight. I'm hoping she will bulk up its better fed and exercise.
She always camps out. I'm not sure why but apparently she always has. Not really out of pain as far as I can tell. She just prefers it.
She is goose rumped and has a weak hind end. Wasp waisted as well. Could be the shadows at play, but looks like a bowed tendon on her right front, and long pasterns on her fronts as well. She has a steep shoulder but her neck ties into it decently. She has her faults but she is certainly not horrible.