The shift from fast-growing to slower-growing chicken breeds is one of the most impactful welfare improvements available in commercial poultry — reducing leg disorders, cardiac disease, and chronic pain.
Fast-growing commercial broiler breeds are arguably the most welfare-compromised animals in the global food system. Their extreme growth rate causes skeletal deformities, cardiac failure, and chronic pain in a high proportion of birds. Transitioning to slower-growing breeds reduces these problems substantially. The scale of benefit — affecting tens of billions of chickens annually — makes this one of the highest-impact welfare interventions in food systems.