Biosecurity practices that prevent the introduction and spread of disease in livestock systems are among the most effective welfare interventions available to farmers.
Biosecurity is a welfare intervention that operates at scale. Disease outbreaks in livestock cause enormous suffering - acute illness, high mortality, and the additional trauma of mass culling programmes. The 2001 Foot and Mouth crisis demonstrated in stark terms what a biosecurity failure means for animal welfare: millions of animals killed, many by methods that were far from ideal under emergency conditions. Good biosecurity practice prevents these welfare catastrophes before they begin. It is also a daily welfare tool: farms with strong biosecurity have lower background rates of respiratory disease, enteric infection, and systemic illness - meaning individual animals experience less suffering throughout their lives. Biosecurity investment delivers welfare returns that compound over time.