A vet can't look into a crystal ball and see the past, but they can certainly examine the horse for signs of wear and tear.
Back to the thread, when I was in college, I made my then boyfriend give me the reins and I led him back to the barn after he jerked the reins so hard that my horse reared with him. He thought I should be mad at the horse. This was the last straw. I traded that boy in for a new model. (The boyfriend, not the horse.)