At a talk I was at tonight there was a guest equine surgeon. He discussed a laser surgery that removes some muscle and severs some nerves that effectively cures cribbing! The muscle removed apparently doesn't affect any performance at all -- they have done this on dressage horses that go on to perform. The nerves severed prevent the release of the endorphins that give the horse the "high" from cribbing. It's about $2500 at his hospital including all care, hospital stay, the surgery itself, meds. Etc. etc.
Thought some of you might be interested. I had never heard of this before.