Biosecurity practices on farms prevent the introduction and spread of infectious diseases that cause enormous suffering and death in livestock populations, representing welfare investment with major returns.
Biosecurity is perhaps the most welfare-impactful investment a livestock farmer can make. Disease outbreaks cause suffering at scale — from individual animals experiencing the pain of foot and mouth lesions, to the mass culling of millions of healthy animals as disease control measures. Prevention through biosecurity requires sustained attention and financial investment, but the welfare return is enormous compared to the suffering of disease events that reach full outbreak scale. The interconnection of modern livestock supply chains means that biosecurity failures on individual farms can cascade to regional or national welfare crises.