Foot and Mouth Disease in Livestock: Welfare During Outbreak Control

Foot and mouth disease (FMD) outbreaks cause significant animal suffering from the disease itself and from the mass culling policies used to control it — raising acute welfare questions about how to balance disease control with the welfare of individual affected animals.

Key Facts

FMD is caused by a highly contagious Aphthovirus causing blisters on the mouth, feet, and teats of cloven-hoofed animals including cattle, pigs, and sheep
Adult animals rarely die from FMD itself, but blisters cause severe pain and lameness, and young animals can die from myocarditis
The 2001 UK FMD outbreak resulted in the culling of over 6 million animals, including healthy animals on adjacent premises
FMD is endemic in much of Africa, Asia, and South America — mass culling control is used primarily in disease-free countries seeking to maintain FMD-free status for trade purposes
Animals culled to control FMD outbreaks may be healthy or have only mild disease — welfare concerns focus on the culling process and pre-cull welfare
Vaccination is available and effective, but FMD-free countries without vaccination retain higher trade value than vaccinated countries — creating an economic incentive not to vaccinate
The ethical tension between culling individual healthy animals for economic trade status versus disease control for animal welfare is unresolved in the literature

Welfare Considerations

FMD welfare operates on two levels. The disease itself causes painful oral and pedal blistures that make eating and walking extremely uncomfortable — cattle with FMD struggle to graze, pigs cannot stand properly, and young animals may develop fatal myocarditis. On top of the disease welfare cost, control policies that cull healthy animals on contact premises raise serious ethical questions about the welfare cost of trade protection decisions. Culling is only welfare-neutral if carried out rapidly, humanely, and competently — mass culling during outbreaks is logistically challenging and welfare quality can be highly variable. The welfare case for advance vaccination programs in endemic border regions, to reduce outbreak scale and need for mass culling, deserves more weight in policy discussions than economic trade considerations typically allow.

What You Can Do

Support policies that prioritize vaccination as a FMD control strategy alongside culling, to reduce the welfare cost of mass culling programs
Advocate for high-quality welfare standards and rapid response protocols in national FMD contingency plans in your country
Engage with food policy debates about the trade-off between maintaining FMD-free-without-vaccination status and animal welfare
Support research into FMD vaccines that allow serological differentiation between infected and vaccinated animals to facilitate trade
Learn about FMD disease dynamics and welfare impacts to engage more effectively in the policy debates around outbreak control
Advocate for compensation programs that remove financial incentives for farmers to conceal early FMD cases, enabling faster welfare response