Broiler Chicken Fast Growth and Leg Welfare Problems

Modern fast-growing broiler breeds experience serious leg disorders due to skeletal systems unable to support their rapid weight gain. This represents one of the most significant farmed animal welfare issues globally.

Key Facts

Commercial broilers reach slaughter weight in 35-42 days, double the growth rate of breeds used 50 years ago
Up to 30% of fast-growing broilers show detectable gait impairment at slaughter weight
Tibial dyschondroplasia and valgus-varus deformity are the most common skeletal conditions in broilers
Lame birds spend more time lying in litter, increasing contact sores on hocks, feet and breasts
Slower-growing breeds show dramatically lower rates of leg disorders while achieving acceptable growth rates

Welfare Considerations

Leg pain in broiler chickens is chronic and progressive. Birds with severe lameness are unable to reach water or feed normally, leading to dehydration, hunger and social exclusion. The pain of walking discourages movement, further weakening muscles and worsening the condition. Research using analgesic preference tests confirms that lame broilers actively choose pain-relieving medication when given the option, demonstrating that the condition causes genuine suffering. The scale of this issue - affecting billions of birds globally - makes it one of the largest unaddressed animal welfare challenges of our time.

What You Can Do

Choose chicken products certified under Better Chicken Commitment or RSPCA Assured standards
Reduce broiler chicken consumption and choose slower-growing breed products when available
Support major food companies that have made Better Chicken Commitment pledges and monitor their progress
Advocate for legislation setting maximum growth rate and minimum welfare standards for broiler production
Contact supermarkets to ask about their supplier requirements on broiler breed and growth rate