Fast-Growing Broiler Breeds: The Central Welfare Crisis of Chicken Farming

Modern broiler chickens have been selectively bred to grow at three times their natural rate. The result is a welfare crisis affecting billions of birds annually — one of the largest sources of animal suffering in the food system.

Key Facts

Commercial broilers reach slaughter weight in 33-42 days, compared to 84 days for slower-growing breeds used fifty years ago
Leg disorders, heart failure, respiratory disease and skin lesions are chronic problems directly caused by fast-growth genetics — affecting a majority of birds in conventional systems
Fast-growing broilers spend up to 76% of their time lying down, often unable to stand, walk or reach food and water normally
The Better Chicken Commitment calls for slower-growing breeds, improved stocking density, natural light and enhanced environmental enrichment — adoption by major food businesses has accelerated
Switching to slower-growing breeds alone — without other changes — significantly reduces leg problems, mortality and the time birds spend inactive

Welfare Considerations

The broiler welfare crisis is characterised by sheer scale and the degree to which suffering is genetically baked into the production system. Individual farm management can ameliorate but not eliminate the welfare problems caused by fast-growth genetics. Systemic improvement requires breed change, and the Better Chicken Commitment provides a clear, measurable pathway. Consumer and corporate pressure has been the primary driver of progress; individual purchasing choices away from standard factory-farmed chicken toward higher-welfare certified products sends the clearest market signal.

What You Can Do

Look for the Better Chicken Commitment logo or RSPCA Assured certification when purchasing chicken
Reduce overall chicken consumption — standard supermarket chicken is the single highest-volume welfare concern in most people's diets
Engage with supermarkets and fast-food companies about their Better Chicken Commitment progress and timelines
Support organisations running corporate campaigns for broiler welfare improvement
Share the scale of the broiler welfare problem — most people are unaware of how routine this suffering is