Farm Animals

Fast-Growing Broiler Chickens: The Welfare Cost of Genetics

Modern broiler chickens have been selectively bred to reach slaughter weight in 35-42 days, causing widespread musculoskeletal disease, cardiac failure, and chronic pain in billions of birds.

Key Facts

A 1957 broiler reached slaughter weight in 84 days; today it takes 35-42 days
Up to 30% of fast-growing broilers experience gait problems by slaughter age
Ascites (fluid accumulation) from cardiac failure affects millions of broilers annually
Breast meat makes up 25% of body weight, causing forward imbalance and leg strain
Slower-growing breeds show dramatically lower rates of health problems

Welfare Considerations

Fast-growing broiler breeds carry a genetic burden of suffering. Their rapid muscle development outpaces skeletal and cardiovascular system capacity, creating chronic musculoskeletal pain, metabolic disease, and mobility impairment. Billions of birds spend their short lives in varying degrees of pain that they are unable to escape.

What You Can Do

Choose chicken from slower-growing breed certification schemes
Support the Better Chicken Commitment campaign for retailer commitments
Ask fast food chains about their broiler welfare commitments
Reduce chicken consumption or choose plant-based alternatives
Advocate for breed welfare standards in poultry production regulations