Actually he has been as sound as anything since I got him (in March). Has had his feet trimmed once and the farrier noticed nothing wrong. But I'm going to have her out again ASAP to look at this and advise me on it. After looking at it again today it doesn't seem like a huge emergency- I just panicked in the night and had all sorts of horrible images running through my mind. Tomorrow I am burning that pile of branches and trees, though- lesson learned!