The vet had no critique of his back, hocks, or even the knee(s). However, his right front hoof has a convex profile, and the left front is a bit dished and splayed, and smaller than the others. It is also more sore to the hoof testers than the others, and he is lame on it. The vet suspects the coffin bone in that hoof is more upright, and the combination of that plus the splayed hoof wall means his laminae could be separating, causing the lameness. Knowing I want to at LEAST trail ride pretty aggressively, and possibly begin endurance at some point, he recommended I not purchase him.
He was also sore on his right hind, but the vet suspects THAT leg/hoof is due to a stone bruise or similar from my trail ride on him on Saturday, and is probably temporary. The left front, however, is a deal-breaker.
In the picture of the horse's left side, you can kind of see the dishing/splaying of the left front hoof (though it could be deceiving--his hooves are striped, and there are shadows), but the right hoof is in shadow too much to see very well.
So the search begins again. Anyone know of a 5-15 year old, 15hh+, stocky horse that's sound for pretty heavy trail riding, in Central Oregon? Breed (and whether it's registered), color, and sex don't matter (though if it's a stallion, it won't be for long). I'm even negotiable on the height, as long as it doesn't look ridiculous with my 36" inseam and can carry my 260 lb weight around indefinitely.