Poultry Stunning Welfare Before Slaughter

Stunning methods used before poultry slaughter vary significantly in effectiveness and welfare, with water bath electrostunning, controlled atmosphere stunning, and neck cutting without stunning each presenting distinct welfare considerations.

Key Facts

Water bath electrostunning is the most common poultry stunning method globally but can cause significant distress during shackling and entry into the bath if not correctly applied
Controlled atmosphere stunning using CO2 or inert gas mixtures is considered more welfare-friendly as birds are stunned before shackling, but high CO2 concentrations are aversive
Shackling of conscious birds prior to water bath stunning causes measurable pain and distress, particularly in species including turkeys
Religious slaughter without pre-stunning — as permitted under religious exemptions in the UK and EU — causes birds to remain conscious for several seconds after neck cutting
Head-only electrical stunning in some systems can render birds unconscious without cardiac arrest, requiring accurate stunning to prevent recovery before bleeding
The UK RSPCA developed the RSPCA Assured higher welfare slaughter standard specifying controlled atmosphere killing for poultry
Poultry slaughter welfare is increasingly scrutinised by retailers, with major supermarkets making commitments to controlled atmosphere stunning

Welfare Considerations

Poultry stunning at slaughter is a critical welfare moment affecting billions of birds annually. The welfare gap between best and worst current practice is significant: shackling of conscious birds followed by poorly calibrated water bath electrostunning causes unnecessary distress that controlled atmosphere stunning avoids entirely by rendering birds unconscious before handling. Consumer pressure has driven retailer commitments that are beginning to change industry practice. The religious slaughter exemption remains contested — the welfare case for mandatory pre-stunning is clear on scientific grounds, but policy resolution must balance welfare evidence with religious freedom in ways that differ by jurisdiction.

What You Can Do

Choose chicken and turkey products from suppliers using controlled atmosphere stunning where available
Engage supermarkets about their poultry slaughter welfare standards and commitments to CAS systems
Support organisations campaigning for higher poultry slaughter welfare standards
Advocate for mandatory pre-stunning requirements that include appropriate religious engagement on alternative welfare methods
Donate to research into the welfare of currently used stunning methods and improvements
Ask food companies about their poultry slaughter audit requirements for suppliers
Share information about poultry slaughter welfare with people who make purchasing decisions about chicken and turkey products