Farmed Chicken Breast Myopathy Welfare

White striping, wooden breast, and spaghetti meat are muscle abnormalities in fast-growing broiler chickens linked to selection for rapid growth, representing significant welfare problems.

Key Facts

White striping and wooden breast affect over 50% of fast-growing broiler chickens in some studies
The conditions result from muscle fibre degeneration and replacement with fat and connective tissue
Wooden breast causes firmness, poor texture, and reduced palatability affecting product quality
These myopathies are strongly associated with breeds selected for rapid growth rates
Slower-growing breeds have significantly lower rates of breast myopathy

Welfare Considerations

Breast myopathies represent pathological muscle damage in living birds. Research using pain biomarkers indicates wooden breast muscle causes nociceptive response in affected birds. The muscle damage progresses through the growth period, meaning affected birds experience tissue pathology throughout their lives. The conditions are caused by genetics that prioritise growth rate over health and welfare. Selecting slower-growing breeds reduces myopathy prevalence and dramatically improves overall welfare.

What You Can Do

Choose chicken products from slower-growing breeds certified under higher welfare standards
Support welfare labelling that enables consumers to identify breed type
Advocate for welfare standards that require absence of breast myopathy in certified products
Support research into the welfare implications of breast myopathy in commercial broilers
Raise awareness that breast myopathy represents real welfare harm in living birds, not just a quality issue