Welfare Metrics: How We Measure Animal Welfare and Why It Matters

Measuring animal welfare accurately is essential for knowing whether interventions work and for holding industries accountable. Understanding the range of welfare metrics available helps advocates evaluate claims and evidence.

Key Facts

The Five Freedoms framework (1965) remains widely used but is increasingly complemented by the Five Domains model
The Five Domains model adds positive welfare as a required dimension alongside freedom from negative states
Qualitative Behaviour Assessment allows trained observers to assess overall welfare state from body language
Pain scales validated for different species allow welfare monitoring in veterinary and farm contexts
Cortisol measurement provides objective physiological data on stress but requires invasive sampling in some contexts
Automated welfare metrics using sensors and cameras are increasingly used in precision livestock farming
Welfare outcome measures at the population level include mortality rates, disease incidence, and medication use

Welfare Considerations

Welfare metrics are the bridge between welfare science and practical improvement. Without measurement, claims of good welfare cannot be verified and progress cannot be tracked. The development of validated, practical welfare assessment tools has been one of the most significant advances in applied animal welfare science. However, metrics are only valuable if they are used honestly -- measuring and reporting bad outcomes as well as good ones, using validated tools rather than proxy measures that are easy to score well, and making data publicly available for independent scrutiny.

What You Can Do

Support research developing and validating practical welfare outcome measures for key farmed and companion species
Advocate for welfare certification schemes to use validated outcome-based metrics rather than input measures alone
Push food companies to publicly report welfare outcome data from their supply chains annually
Engage with welfare labelling schemes to understand what metrics they actually use and how they are audited
Use welfare outcome data when evaluating which animal welfare organisations are achieving the most impact