At the right time of year around here (central TX), it wouldn't take long. This summer, a large dog was hit down the road from my house. Nothing ugly, just dead on the side of the road. Within a week and a half it was clean bones. Between the flies and the dermistid beetles, it was completely stripped clean. Morbid but facinating; the day after it was hit it looked like it had been shaved, there was a halo of hair outlining its body. The beetles had cut the hair. I wasn't until it was a skeleton, looking almost like a museum display, that larger animals messed with it and scattered the bones.

A few years ago, near the same spot, a feral pig lay pretty much complete for almost two months during the winter. Just kind of got waxy looking and dehydrated.