Poultry Pre-Slaughter Stunning Advances

Pre-slaughter stunning ensures poultry are unconscious before slaughter - technological advances are improving reliability and welfare outcomes.

Key Facts

Electrical water bath stunning is the most common method for poultry - birds are hung inverted and passed through electrified water
Controlled atmosphere stunning using CO2 or inert gas mixtures renders birds unconscious before hanging
Electrical stunning requires correct voltage calibration - understuning causes reversible stunning with birds recovering before slaughter
Controlled atmosphere systems are considered welfare superior as birds are stunned in their transport containers without inversion stress
Many major food companies and retailers have committed to controlled atmosphere systems for broiler slaughter
Religious slaughter exemptions from pre-slaughter stunning remain controversial and legally variable across jurisdictions

Welfare Considerations

Pre-slaughter stunning welfare depends critically on the method used and its consistent application. Electrical water bath stunning requires birds to be hung inverted while conscious - a stressful procedure before any electrical contact. If the electrical parameters are incorrect, birds may be insufficiently stunned and recover consciousness before slaughter. Controlled atmosphere systems avoid inversion stress and provide more consistent and reliable unconsciousness, but require infrastructure investment. The welfare case for transition to controlled atmosphere systems is strong and is supported by major food service and retail commitments. Religious slaughter exemptions from pre-slaughter stunning present a genuine welfare challenge, as unstunned slaughter causes a period of pain before unconsciousness that humane killing should avoid.

What You Can Do

Choose poultry from producers using controlled atmosphere stunning rather than electrical water bath systems
Support retailer and food service commitments to controlled atmosphere stunning procurement
Engage with religious communities and regulatory bodies about the welfare case for pre-slaughter stunning
Support research into approved stunning methods that meet both welfare and religious requirements