Effective biosecurity on farms prevents disease introductions that cause welfare harm at scale, making prevention one of the highest-leverage welfare interventions.
Disease prevention through biosecurity is a welfare intervention that benefits thousands of animals simultaneously by preventing introductions that would cause mass suffering and culling. A single biosecurity failure allowing highly contagious disease onto a farm triggers welfare events affecting entire herds or flocks. The welfare cost of preventable disease outbreaks - both in suffering during illness and mass culling responses - vastly exceeds the cost of prevention. Welfare-focused biosecurity is an investment in the health and wellbeing of all animals on farm.