Chicken Stunning at Slaughter - Water Bath

Water bath stunning of poultry before slaughter is the dominant method used globally. Understanding its welfare limitations informs campaigns for improved stunning technology.

Key Facts

Water bath stunning uses electrical current through water to render chickens unconscious before slaughter
Low-amperage stunning can cause paralysis without unconsciousness, masking pain while failing to provide insensibility
High-amperage stunning causing cardiac arrest provides better welfare but is not universally used
Controlled atmosphere stunning using nitrogen or argon gas avoids the shackling stress of water bath systems
Approximately 90% of UK broilers are stunned using water bath methods before slaughter

Welfare Considerations

Water bath stunning welfare depends critically on electrical parameters that are often set to minimize carcass damage rather than maximize welfare. Low-amperage stunning that causes immobility without true unconsciousness means birds may experience pain during slaughter without ability to react. The shackling process before stunning - hanging birds by their legs while conscious - is itself a significant welfare harm involving fear, pain, and injury. Controlled atmosphere stunning systems eliminate shackling by stunning birds in transport containers, representing a significant welfare improvement even if the gas combinations used also vary in humaneness.

What You Can Do

Support campaigns for mandatory higher-welfare stunning in UK and EU poultry slaughter
Advocate for controlled atmosphere stunning with welfare-positive gas mixtures as an industry standard
Choose poultry certified to standards requiring improved stunning such as RSPCA Assured
Ask food companies whether their poultry slaughter monitoring includes stunning effectiveness