Antibiotic use in cattle is both a welfare tool — treating disease and pain — and a welfare concern when overuse drives resistance that reduces treatment efficacy, with responsible use frameworks seeking to balance both considerations.
Cattle with untreated bacterial infections — mastitis, pneumonia, foot rot — experience pain and systemic illness that constitute significant welfare harms. Appropriate antibiotic treatment is a welfare intervention. However, overuse of antibiotics without concurrent welfare improvements perpetuates the conditions that generate disease. Antibiotic resistance developing from agricultural use potentially compromises treatment efficacy for both animal and human bacterial infections — a welfare harm to future animals and people. The most ethical approach combines welfare-focused preventive management with targeted, veterinary-directed antibiotic use only when needed.