Why do they think it was a lion? It doesn't really look like lion damage. Don't get me wrong, lions kill horses on occasion, but as often as not lions get the blame for damage caused by many other causes. I had a damage complaint a few years ago that as soon as I looked at the horse I could tell it was wire. Rancher was very argumentative. So I walked the fence line and found where the horse had been completely down and tangled where he had ran into the fence. Documented with pictures and took the rancher to the spot. Rancher was still determined it was a cat and at that point said that even though it may have been the wire that caused the cuts, a lion must have ran the horse into the wire! No tracks, no other evidence of a lion in the vicinity. I have horses and have had my entire life. They can find many unique and interesting ways to get cut without the help of a lion.