Pig Pain Recognition and Assessment

Recognising pain in pigs requires understanding their stoic nature and subtle behavioural signals. Evidence-based pain assessment improves welfare by enabling timely intervention.

Key Facts

Pigs conceal pain as a survival mechanism, making early detection critical for welfare-focused farm management
The Grimace Scale for pigs identifies facial action units including ear position, orbital tightening, and nose bulge associated with pain
Lame pigs show characteristic postural changes and reluctance to bear weight that trained observers can reliably identify
Tail posture is an important welfare indicator; a clamped tail indicates distress across production stages
Vocalisations including high-pitched squeals during routine procedures indicate significant pain and stress
Pain from routine procedures like castration and tail docking is now recognised by regulators and industry as welfare-significant

Welfare Considerations

Pig pain recognition has improved enormously as a scientific discipline in the past two decades, but implementation on commercial farms lags behind the science. Pigs routinely experience untreated pain from lameness, injuries, and disease because the subtle signals they use to communicate discomfort are missed or ignored. Training farm staff in validated pain assessment tools is one of the highest-impact interventions available to improve pig welfare. Farms that invest in this training consistently identify and treat more pain, with direct welfare and production benefits.

What You Can Do

Support training programmes that teach pig farmers validated pain assessment methods
Advocate for pain assessment competency to be required in pig farm assurance schemes
Choose pork from farms with documented pain management protocols
Support research into pig pain indicators and assessment tools
Advocate for mandatory pain relief for all routine surgical procedures in pig farming