Aw. Poor Legs.

A similar thing happened to our boarding horse, Comet. We had a "no climb fence" (we've since replaced it). Comet used to put his hoof on the fence and push it down so he could reach the grass on the other side. Well, one day he broke part of the fence and his leg went through. He got his leg weaved through pretty good. My husband cut the fence and we got him out.