Welfare Science

Farmed Animal Pain Assessment Tools

Validated pain assessment tools for farm animals including grimace scales for pigs, sheep, cattle, and horses enable stockpersons to recognise and respond to pain in animals that cannot verbalise suffering.

Key Facts

Grimace scales assess facial muscle tension as pain indicators across multiple species
Pig Grimace Scale was developed and validated for pain assessment in research settings
Sheep Pain Facial Action Units system provides validated assessment for sheep
Cattle pain assessment uses facial and postural indicators in combination
These tools are increasingly used in veterinary education and welfare assessment

Welfare Considerations

Pain assessment tools transform pain management in farm animals by making previously invisible suffering observable and quantifiable. Stockperson training in grimace scale use enables earlier pain recognition and intervention. These tools should be standard components of farm animal welfare training.

What You Can Do

Advocate for pain assessment training using grimace scales in stockperson education
Support research developing and validating pain assessment tools for more species
Engage with pain assessment science to understand current evidence and gaps