Deer Leg In The Forest

Today I found half of a deer leg in the forest. It was fresh and it looked like a predator attack. I went for a walk after a heavy rain and unfortunately any sign of tracks were eliminated by the weather. It is possible that a small critter dragged the leg to this location, but the question remains as to what killed the deer? It's possible it died of natural causes, but I don't think so. It looked like a medium sized deer and the hoof did not appear to be from an old deer. It could have been coyotes, but I do not think they were responsible. I have never seen a coyote in this particular area, nor found tracks. I hear them on the other side of the lake, but not on this side and so close to the house.