Luby, you absolutely, positively do not know that for a fact. He stands and moves like a horse in pain. You've had exactly one vet look at him, and it wasn't the most thorough of examinations. I know we've been through this a hundred and one times, but until he is thoroughly vetted by an actual lameness specialist, who knows far more about this sort of thing than the average equine/general veterinarian, I'm going to continue to believe what my eyes are telling me. Imagine if your own back looked like that....do you think it would feel good? I have a mild case of lordosis in my lower back, which is basically the reverse of a roach, and I am always in some pain, and it wrecks my posture and makes me a very stiff and defensive mover....