A photo from Mexico United for the Respect of Animals, with the Spanish caption translated by Google:
Chickens killed Foam The new invention of the processing system ‘product’ (animals) on farms and factories for the production of egg and meat. In just 15 minutes no less than 15 000 birds deemed unnecessary and “waste” can be consumed by asphyxiation with this type of foam, similar to that used for washing cars and other machinery. Engineers, agronomists and animal exploitation business congratulate themselves on “the effectiveness and profitability of this system.”
I can’t imagine anyone who has thought about animal welfare thinks this foam is an acceptably humane slaughter method. I’d like to know what’s done with the carcasses after the birds have been asphyxiated.