Livestock Antimicrobial Resistance: Welfare Consequences of Antibiotic Use

The relationship between antibiotic use in livestock farming, antimicrobial resistance, and animal welfare creates complex tradeoffs requiring careful management.

Key Facts

Approximately 73% of antimicrobials sold globally are used in food animal production
Antimicrobial resistance is projected to cause 10 million human deaths annually by 2050 without intervention
Prophylactic antibiotic use — preventing disease in healthy animals — is the most contested practice in livestock medicine
EU banned antibiotic growth promoters in 2006, resulting in reduced use without significant welfare deterioration in most sectors
Higher welfare systems that reduce crowding and disease pressure generally have lower antibiotic use as a consequence
Animals in intensive systems without prophylactic antibiotics may face higher disease rates and associated welfare costs

Welfare Considerations

Antimicrobial resistance creates genuine welfare dilemmas in livestock production. Prophylactic antibiotic use in intensive systems maintains animal health in conditions where disease pressure would otherwise cause significant suffering — but drives resistance development that threatens both human and animal health in the future. The welfare-positive resolution is to improve husbandry conditions so that prophylactic antibiotics are not necessary rather than simply removing them from systems that remain inherently disease-prone. Lower stocking densities, improved ventilation, better hygiene, and enhanced immune function through nutrition and management reduce disease pressure and antibiotic need simultaneously, aligning welfare and antimicrobial stewardship goals.

What You Can Do

Choose animal products from producers who have reduced antibiotic use through improved husbandry rather than simply treating sick animals less
Support policies that restrict prophylactic antibiotic use in livestock while investing in the husbandry improvements that make this viable
Advocate for transparency in antibiotic use data across the livestock sector to enable monitoring and accountability
Support One Health research that investigates the linked consequences of antibiotic use for animal, human, and environmental health
Engage with food companies on antibiotic stewardship commitments that go beyond use restriction to husbandry improvement