Stop gassing innocent pigs!

I just did 5 min of research and share here to maybe save some a click into less pleasant stuff. I think many of us here know that CO2 or nitrogen-gas asphyxiation is a common means of killing undesired non-human animals on farms. I don't think that's what's at play here, as I found no guidelines recommended 'gassing' as a killing method on dairy farms. Moreover, one of the greatest risks to workers' lives on farms with cattle, seems to be the enormous amount of manure that builds up on these facilities. Not only can humans easily drown in it, but it's a powerful source of methane gas and fumes around these massive manure pits can prevent normal breathing and cause loss of consciousness and death. There are several reports of these things; search "US dairy farm asphyxiation" (although the current story predominates early hits). It's also worth noting that there are many 'ag-gag' laws that prevent regulators from examining these spaces for safety in the first place and also prevent them from investigating after casualties like this.

More:
Manure pit injuries: Rare, deadly, and preventable
Dairy Workers on Wisconsin’s Small Farms Are Dying. Many of Those Deaths Are Never Investigated

They don't say how this happened, but that kind of thing isn't that rare on farms. Manure pits, grain bins, and other areas with poor ventilation can allow gases like methane, carbon dioxide, ammonia etc to build to lethal levels.

one worker goes into area, drops from the lack of air, next guy goes in to try and save guy 1 without realizing what's going on, ends up lying next to him.