Pain assessment tools for pigs — from grimace scales to behavioural observation protocols — are transforming how producers identify and respond to animal suffering. Standardised scoring is a foundation of welfare-positive pig farming.
Pain scoring in pigs represents the operationalisation of the commitment to take pig suffering seriously. Without systematic measurement, pain goes undetected and untreated — the default state in most commercial pig farming. The development of validated pain assessment tools — from the grimace scale for neonates to composite behavioural scores for adults — has created the foundation for welfare monitoring programmes that can detect problems early and track improvement over time. Slaughterhouse feedback systems, where lesion data from slaughter inspections are reported back to farms, create an accountability mechanism that links production practices to welfare outcomes. Producers who routinely score pain and use the results to trigger treatment and investigation of underlying causes achieve lower pain prevalence in their herds. The integration of pain scoring into certification scheme requirements means that producers seeking higher-welfare accreditation must demonstrate systematic monitoring — driving both measurement and management improvement.