Nature always keeps up guessing.
My neighbor bought some cows from Kansas once. A few of them died within a couple days. Nothing touched those cows. Buzzards or yotes. We just guessed they had some type of infection that the scavengers know not to eat.
The old momma cows that die naturally usually don't last more than a couple days.
Yotes and coons rarely seem to get touched by buzzards either.
Rabbits seem to be the same. I've seen them gone overnight. I have also seen them sit for a couple of weeks. One night we shot about 10 jack rabbits. I piled them up under a feeder so I could get pictures. Those things sat there for about 2 weeks before a lone hog finally scattered them out. Won't do that again.
gagged the whole time I had to fill that feeder.