Bird Flu Culling and Farm Animal Welfare

Avian influenza outbreaks trigger the culling of millions of birds to prevent spread, with significant welfare concerns about culling methods and the conditions leading to outbreak susceptibility.

Key Facts

The 2021-2024 avian influenza outbreak was the largest in history, with over 100 million birds culled globally
Culling methods include carbon dioxide gassing, ventilation shutdown (heat), and foam suffocation
Ventilation shutdown plus heat has been condemned by animal welfare scientists as causing prolonged suffering
High-density poultry farming creates conditions that amplify disease spread when outbreaks occur
UK DEFRA's preferred culling methods exclude ventilation shutdown but some US states have permitted it
Disease-resistant breeds and lower-density farming systems would reduce both outbreak severity and culling welfare harm

Welfare Considerations

Mass culling of millions of birds creates an acute welfare crisis of enormous scale. The choice of culling method matters critically: CO2 gassing causes rapid loss of consciousness while ventilation shutdown causes heat stress and slow death over hours. The scale of culling - often millions of birds per outbreak - means that small differences in welfare quality of the method translate to enormous aggregate suffering. Beyond the culling event, the high-density systems that create outbreak conditions represent a structural welfare problem that culling does not address.

What You Can Do

Advocate for humane culling method standards that exclude ventilation shutdown and heat methods
Support lower-density poultry farming regulations that would reduce outbreak severity
Back vaccination programs for poultry that could reduce culling necessity during outbreaks
Advocate for bird welfare to be explicitly included in national avian influenza response plans
Choose poultry products from lower-density farms less vulnerable to the rapid outbreak spread driving mass culling