We had a runt piggy drop dead from apparent natural causes. We actually witnessed it have a seizure, then its heart stopped. We gave it chest compressions, but it never came back. My neighbor is an excellent stockman and my other neighbor is a retired biology/botany professor (PhD). We all came together, strung it up, bled it, then cut it up rather than have it all go to waste. There were no signs of pathology on any of the organs. Knowing it was always a weak one, we kept it for our own freezer.
We cut it up on our kitchen table using first a pruning saw, then smaller knives into roughly recognizable cuts. We did end up turning about 100 lbs of it into sausage and kept the tenderloins and "Rack of Pork" for ourselves.