The installation of CCTV cameras in slaughter facilities and the use of official veterinarians to review footage has demonstrably improved animal welfare outcomes, making it among the most evidence-based welfare policy interventions.
CCTV in abattoirs works by combining deterrence with detection — staff aware of monitoring show improved welfare behaviors, and recorded incidents enable regulatory response. The evidence base for welfare improvement from CCTV is among the strongest for any specific animal welfare intervention. Mandatory CCTV has transformed welfare culture in many facilities where it has been implemented.