The overuse of antibiotics in livestock farming creates both animal welfare problems through disease burden and global health risks through antimicrobial resistance.
Antibiotic overuse in farming reflects and enables poor welfare conditions. Animals kept in crowded, stressful conditions become immunocompromised and disease-prone, requiring antibiotics that healthy animals in better conditions would not need. This creates a feedback loop: poor welfare drives antibiotic dependence, antibiotic resistance drives disease burden, and disease creates welfare harms. Reducing antibiotic use requires improving the welfare conditions that make it necessary.