Broiler Chicken Fast Growth Genetics Welfare

The selective breeding of broiler chickens for extremely rapid growth rates has created serious welfare problems, with industry-led reform efforts now underway in some markets.

Key Facts

Modern broiler chickens reach slaughter weight in 35-42 days compared to 12-16 weeks historically
Fast-growing breeds experience high rates of leg disorders, heart disease, and ascites
Up to 27% of fast-growing broilers show severe gait abnormalities by slaughter weight
Chronic pain from musculoskeletal conditions is well-documented in fast-growth breeds
The Better Chicken Commitment calls for slower-growing breeds with improved welfare outcomes
Some major food companies have committed to transitioning away from fastest-growing breeds
Welfare-outcome monitoring through gait scoring and mortality data tracks improvement progress

Welfare Considerations

The genetics of modern broiler chickens represent one of the most significant and widespread welfare problems in modern agriculture. Selecting for extreme growth rate has created breeds that suffer chronic pain, respiratory distress, and mobility impairment throughout their short lives. Transitioning to slower-growing breeds with better welfare outcomes is both technically achievable and commercially viable.

What You Can Do

Support retailers and food companies committed to the Better Chicken Commitment
Choose chicken products from slower-growing breed systems where labelled
Advocate for breed welfare standards to be included in national farm assurance schemes
Support research into genetic selection criteria that balance production with welfare
Reduce chicken consumption or shift to higher-welfare certified products to drive market change