Broiler Breast Muscle Disease: A Welfare Crisis in Chicken Production

Modern fast-growing broiler breeds suffer from a spectrum of breast muscle disorders that cause pain and impair mobility, representing a systemic welfare failure in the chicken meat industry.

Key Facts

White Striping and Wooden Breast affect up to 70-90% of fast-growing broilers
Wooden Breast results in hard, pale, textured breast meat due to muscle fiber degeneration
Affected birds show altered gait and reduced ability to access feeders and drinkers
Slower-growing breeds have dramatically lower rates of muscle disease
The EU and major retailers are under growing pressure to adopt Better Chicken Commitment standards

Welfare Considerations

Breast muscle disorders represent metabolic disease driven by selective breeding for extreme growth rates. Affected chickens experience muscle necrosis — tissue death in living tissue — which is painful. The same genetics that cause muscle disease also drive leg weakness, heart failure, and respiratory compromise. Birds reach slaughter weight at 6 weeks — faster than their cardiovascular and skeletal systems can adapt. The industry has known about these conditions for decades; solutions (slower genetics, better environments) exist but cost more per bird.

What You Can Do

Choose chicken labeled as slow-grown, free-range, or meeting Better Chicken Commitment standards
Ask your supermarket whether their chicken suppliers have signed the Better Chicken Commitment
Reduce chicken consumption and shift toward plant proteins on some days
Support policy mandating slower-growing breeds in poultry welfare standards
Share information about breast muscle disease with others who buy chicken regularly