Effective stunning before slaughter is the primary welfare safeguard for billions of poultry. Monitoring stunning efficacy and addressing failure rates represents one of the highest impact welfare interventions in commercial slaughter.
Stunning efficacy failure in poultry slaughter means birds enter the bleeding phase of slaughter while conscious, experiencing the fear and pain of being unable to move or escape combined with blood loss. The scale of failure rates in large volume systems means that even 1% failure represents millions of birds experiencing conscious slaughter annually. Improving stunning efficacy requires a combination of system design optimisation, operator training, monitoring technology, and independent verification. The introduction of CCTV monitoring in UK slaughter plants following the 2018 legislation change has driven measurable welfare improvements through increased accountability. The welfare benefit of closing the remaining gap in stunning efficacy is enormous given the scale of poultry slaughter.