Comment by Pyrodogg

I worked one summer for my uncle helping to construct new farrowing barns for pigs. One of the clearest lessons I got was to never, EVER, get down near the manure pits of the barns in use and that if anyone did have problems, to not go in after them.

After that, was lessons about watching for risks of fire and knowing where to GTFO.

I don't remember any at-the-time recent issues with asphyxiation and there were well known cases of barn fires every 5-8 years (we were replacing one that burnt down the year before). Still, the bigger warning I remember was about safety near manure.