Measuring animal welfare systematically is essential for tracking progress, identifying problems, and holding producers accountable. A range of welfare index frameworks have been developed for different contexts.
Welfare indices translate complex, multi-dimensional animal experiences into formats that farmers, retailers, regulators, and consumers can use to compare and improve performance. Well-designed indices measure what animals actually experience — their health, behaviour, and emotional state — rather than just what inputs they receive. The shift from input-based standards (pen size, feed composition) to outcome-based welfare assessment (lameness prevalence, stereotypy rates, positive affect indicators) represents a significant advance. Indices that are publicly reported create accountability and enable competitive improvement. However, poorly designed indices can be gamed, hide trade-offs between welfare dimensions, or create a false impression of comprehensive coverage. Critical engagement with how welfare is measured is as important as the measurement itself.