These photos from the Londolozi Blog shows the first level of consumption. Then come the ants...
A hippo has a lot of mass of concentrated protein. Its skin is virtually impenetrable and needs skinning knives of the highest order being 1.5" thick in places.
I have seen little deer carcasses lying around in Colorado for a week and more. Look at this:
Half a day and one night is all that is needed. The area around the carcass turned into a mini dust bowl
Here is the full story from the Londolozi Blog: