Farm Animal Welfare

Pig Pain Scale Advances

Validated pig pain scales including the Piglet Grimace Scale are transforming pain recognition in commercial pig farming. Implementation is improving welfare for painful procedure management.

Key Facts

The Pig Grimace Scale (PGS) provides validated facial action unit assessment for acute pain
Piglet Grimace Scale variants are adapted for neonatal pain assessment in the first days of life
Post-operative pain in pigs reduces feed intake, growth rate, and immune function
Farmer training in grimace scale interpretation improves pain recognition and treatment rates
Certification programs are beginning to incorporate pain scale use in welfare auditing

Welfare Considerations

Pig pain scale validation has provided the assessment tools needed to objectify what was previously subjective in farm pig pain management. Validated scales transform pain recognition from vague clinical impression to systematic assessment that identifies animals requiring treatment. Implementation in practice requires training investment but produces welfare returns across every animal in pain-causing procedures.

What You Can Do

Support pig welfare programs including grimace scale training for stockpeople and vets
Advocate for pain scale use requirements in pig welfare certification programs
Choose pork from farms with documented pain management protocols using validated assessment
Support research validating pain scales for chronic pain conditions in farm pigs