Conventional fast-growing broiler breeds suffer endemic leg problems, cardiovascular disease, and poor welfare; slower-growing alternatives demonstrate that productive farming and animal health are compatible.
The welfare problems of modern fast-growing broiler breeds are an artefact of selection pressure that has been applied faster than the capacity to maintain musculoskeletal and cardiovascular soundness. The birds are in effect made sick by the demands of their own growth. Slower-growing breeds demonstrate that meaningful welfare improvement is possible without abandoning commercial poultry production — but requires consumer and retail commitment to the additional cost.