Disease is one of the greatest sources of suffering for farm animals. Prevention-focused veterinary programs and biosecurity reduce suffering at population scale.
Disease prevention in livestock is a massive welfare opportunity. The scale of suffering caused by preventable disease in farm animals — billions of individuals experiencing fever, respiratory distress, diarrhea, joint pain, and other disease sequelae — dwarfs most visible welfare issues. Systematic herd health programs that combine vaccination, biosecurity, nutrition monitoring, and early detection significantly reduce this burden. The antibiotic stewardship challenge is particularly important: overuse of antibiotics in livestock drives resistance that reduces treatment effectiveness for both animal and human medicine. Welfare-focused herd health management reduces antibiotic use by preventing disease rather than treating it, creating a virtuous cycle that benefits animals, humans, and public health simultaneously.