Antibiotic use in livestock has major implications for both animal welfare and global public health through antimicrobial resistance. Understanding the connection is essential for responsible food choices.
The antibiotic-welfare connection runs in both directions. Antibiotic overuse in livestock — particularly routine metaphylactic treatment to prevent disease in stressed, crowded animals — suppresses the disease signal that would otherwise indicate welfare problems needing attention. Healthy, well-managed animals in appropriate housing need antibiotics rarely, for genuine illness. The fact that high antibiotic use is often an indicator of poor welfare conditions creates an important synergy: improving animal welfare reduces antibiotic dependency, and reducing antibiotic use forces improvements in the management and housing that prevent disease. This is why welfare-led approaches to antibiotic reduction — improving conditions rather than simply replacing antibiotics with alternatives — are both more sustainable and more animal-welfare-positive than pharmaceutical substitution alone.