Recognising Pain in Farm Animals: Closing the Detection Gap

Farm animals often conceal signs of pain as a survival adaptation. Better pain recognition by farmers and vets is essential for timely treatment and reduced suffering across livestock species.

Key Facts

Prey species including cattle, sheep, pigs, and poultry have evolved to mask signs of weakness including pain — making detection difficult
Grimace scales — mapping facial muscle tension to pain levels — have been validated for mice, rats, rabbits, horses, cattle, sheep, and pigs
The Lamb Grimace Scale and Horse Grimace Scale are now used clinically to detect post-operative and disease-related pain
Behavioural changes including reduced movement, altered posture, social withdrawal, and changes in feeding behaviour are key pain indicators
Lameness in cattle and sheep is one of the most prevalent and undertreated welfare problems on UK farms — affecting up to 30% of dairy cows
Pain-related productivity losses in livestock cost the industry billions annually — creating economic as well as welfare incentives for better detection
Systematic pain assessment tools are underused on most farms, with many farmers relying on informal observation without structured criteria

Welfare Considerations

The inability — or failure — to recognise pain in farm animals is one of the most significant barriers to farm animal welfare improvement. Animals that do not vocalise or display obvious distress may still be in chronic or acute pain. Lameness, mastitis, respiratory disease, and post-surgical recovery are all common sources of significant pain in farm animals that are frequently undertreated. The pain assessment tools now available — grimace scales, locomotion scoring systems, and validated behavioural checklists — provide farmers and vets with practical methods for earlier, more reliable pain detection. Their widespread adoption requires training, culture change, and regulatory standards that mandate pain assessment as part of routine animal care.

What You Can Do

Support mandatory pain assessment training for farmers and farm workers as part of agricultural qualifications and farm assurance renewal
Advocate for inclusion of pain recognition indicators in farm assurance scheme standards and inspection protocols
Choose assured welfare products from farms demonstrating commitment to systematic health and lameness monitoring
Promote veterinary practice guidelines that require pain assessment scores and documented analgesic use for common procedures
Donate to research institutions developing validated pain assessment tools for species currently lacking them
Raise awareness among pet owners and hobby farmers that prey species mask pain — behaviour changes warrant veterinary investigation
Support the Animal Pain Management campaign and similar initiatives promoting pain recognition as a core veterinary and farming competency