Vultures would likely be the first to find the carcasses. No way they cut through the skin on the back. With a fresh carcass, they’re limited to dragging organs out through an orifice. Makes me wonder about the reproductive system being gone. I saw a large cougar that a trapper had taken. The abdomen was deflated. I asked him how much it weighed, and he said “ Probably about 150 pounds, before the buzzards dragged its guts out it’s ass.” Didn’t see a mark on it.
But it certainly is a mystery.