Poultry Slaughter Welfare: Pre-Stunning Methods

Pre-slaughter stunning in poultry aims to render birds unconscious before killing, but method choice significantly affects welfare outcomes for billions of birds annually.

Key Facts

Over 1 billion poultry are slaughtered annually in the UK, primarily chickens
Water-bath electrical stunning is the most widely used method in conventional systems
Conventional water-bath systems can cause pre-stun shocks and pain during shackling
Controlled atmosphere stunning (CAS) using CO2 or inert gas avoids live shackling
High CO2 concentrations cause distress before unconsciousness in birds
Low-oxygen CAS using nitrogen or argon is considered higher welfare but is more expensive
Multi-phase CAS systems use low CO2 to induce unconsciousness before higher concentrations
The UK requires pre-slaughter stunning except for religious slaughter under religious exemption

Welfare Considerations

Poultry slaughter welfare is a massive-scale issue given the numbers involved. Conventional water-bath stunning systems have well-documented welfare problems including live shackling of conscious birds and inconsistent stunning from poor electrical contact. Controlled atmosphere systems eliminate live shackling but introduce aversion during induction in CO2-based systems. The most welfare-positive approach - multi-phase low-oxygen systems - remains costly. Improvements in monitoring and enforcement of stunning effectiveness would benefit billions of animals.

What You Can Do

Support retailers and food service companies committing to improved stunning systems
Advocate for phasing out conventional water-bath stunning in favour of higher welfare alternatives
Support the RSPCA and Humane Slaughter Association campaigns on poultry slaughter welfare
Choose products labelled with welfare-assured schemes that specify stunning method requirements
Contact your MP to advocate for stronger enforcement of slaughter welfare regulations