Hi HRH Princess Spikey
That must have been very distressing for you discovering that.
Sadly, it’s impossible to say what might have done that, although I suspect not another hog. If you have foxes around, one of them could be the culprit, but that is a complete guess with only a small element of process of elimination – youngsters sometimes play with hogs, but are more likely to injure, ie. back legs. It seems odd if it was an adult fox (which sometimes do kill and eat hogs) that it didn’t eat part of the main body – unless it was disturbed.
So, sorry, I can’t be much help, but I hope there aren’t any other similar instances. Not a nice thing to find.