Poultry slaughter is among the highest-volume welfare events in animal agriculture — with billions of birds slaughtered annually, small improvements in stunning and handling have enormous aggregate welfare impact.
Poultry slaughter welfare represents a case where small percentage improvements in process quality translate to enormous welfare impacts given production volume. Even a 1% rate of inadequate stunning in a facility slaughtering 1 million birds per day results in 10,000 birds experiencing conscious scalding daily — a welfare catastrophe at industrial scale. Conventional electrical water bath stunning involves painful pre-stun shocks from electrical contact before loss of consciousness, and live hanging causes pain and injury in a proportion of birds. Controlled atmosphere stunning addresses both problems by achieving insensibility before any handling — birds experience gas exposure in transport containers or at the line, avoiding live-hung distress entirely. The welfare case for controlled atmosphere stunning adoption is strong, and major food companies have begun requiring it through supply chain commitments. Regulatory requirements for controlled atmosphere stunning would provide the most consistent welfare improvement.