Antibiotic use in livestock is both a public health concern and a welfare issue, with the reduction of preventive antibiotics changing how farm animal health is managed.
The reduction of preventive antibiotics has revealed underlying welfare problems in intensive systems that were previously suppressed by medication. Systems that relied on antibiotics to control respiratory and gastrointestinal disease must now address the root causes — crowding, ventilation, nutrition, and stress. This represents a potentially positive welfare development if farmers invest in the underlying management improvements rather than simply reducing antibiotic use while maintaining inadequate conditions.