If you think this is only about the welfare of chickens, think again.
Realize that that chicken shit along with spilled chicken feed containing Specified Risk Materials is fed to cattle creating a circle in Hell where cows are fed shit and BSE. And no, prions are not destroyed by heat, so guess where they end up? In you pet’s bowl, on your plate, in farmed fish, in animal feed for farm animals: poultry, pigs and cattle.