Welfare outcome auditing on pig farms uses animal-based measures to assess actual welfare rather than resource provision alone. Understanding audit methodology helps advocates evaluate certification credibility.
The quality of welfare auditing determines whether certification claims reflect genuine welfare improvement or procedural compliance. Resource-based auditing that checks space allowances, housing type, and enrichment provision can be passed by farms with poor welfare if the resources are present but managed inadequately. Animal-based auditing that measures the welfare state of individual animals through lesion scoring, behavior observation, and health assessment captures the actual welfare outcomes that matter. The Welfare Quality protocol represents the scientific gold standard for comprehensive pig welfare assessment but is rarely implemented in full by commercial certification schemes due to cost and complexity. Moving welfare certification toward animal-based outcome measurement with transparent public reporting is the frontier of meaningful welfare assurance.