The complex relationship between antibiotic reduction, animal health, and welfare outcomes
Livestock antibiotic use accounts for approximately 70-80% of total antibiotic consumption globally, driving antimicrobial resistance (AMR) that threatens human health. Reducing livestock antibiotic use is a public health imperative. However, the welfare implications of antibiotic reduction must be carefully managed — poorly implemented reduction programs can increase animal suffering from untreated bacterial disease. The goal is antibiotic reduction through improved animal health, not through withholding treatment from sick animals.
The Netherlands example is instructive: aggressive antibiotic reduction targets forced farms to improve biosecurity, reduce stocking density, improve ventilation, and enhance management — all welfare-positive changes. The result was both dramatically lower antibiotic use AND better animal health outcomes. This demonstrates that welfare improvement and AMR reduction are complementary rather than conflicting goals.
Metaphylaxis — treating entire groups of animals because some show signs of disease — is common practice for BRD (bovine respiratory disease) and swine respiratory disease. It is welfare-positive (preventing disease in at-risk animals) but contributes to AMR. Vaccination programs, improved stress management, and better diagnostic tools can reduce metaphylaxis needs while maintaining welfare outcomes. Targeted treatment of clinically affected individuals (with adequate monitoring for new cases) is the welfare-compatible AMR-reduction approach.