I have done a wee bit of research and found a bit of poop on pig opp homicide. It appears that the real risk with pig poop is in breathing the vapors which are very toxic in confined spaces I found references to death among workers cleaning poop storage tanks in Maryland and Saskatchewan. Apparently the air in those things is full of hydrogen sulfide which is, I believe, referred to as sour gas in the Oil industry.
This leads to another point, I have seen stories on the news about pig farm generated electricity where the methane etc. is burned to generate electricity. Is this a viable option for the hog industry? a byproduct of a byproduct? I understand there is a saying at hog processing plants that “the only thing wasted is the squeal”. This could take that ethic to another level.