Slower-growing broiler breeds were developed to address the welfare problems caused by extreme growth selection. Their adoption represents one of the most impactful interventions in poultry welfare.
Slower-growing breed adoption may be the single most impactful welfare intervention available in commercial chicken production. The welfare problems of standard commercial broilers — lameness, cardiac disease, respiratory compromise — are not management failures but predictable consequences of extreme growth selection. Slower-growing breeds with better physiological balance show dramatically lower rates of these conditions because their skeletal and cardiovascular systems can support their body weight. The welfare improvement is fundamental and structural, not merely a management adjustment.