The Five Domains of Animal Welfare

The Five Domains model updates the classic Five Freedoms framework to include mental states, providing a more complete framework for assessing and improving animal welfare in any setting.

Key Facts

The Five Freedoms (1965) established freedom from hunger, discomfort, pain, fear, and to express normal behaviour
The Five Domains model (Mellor and Reid, 1994) adds mental/affective state as a fifth domain
The domains are: nutrition, environment, health, behaviour, and mental state
Assessment of all five domains provides a fuller welfare picture than outcome measures alone
The Five Domains explicitly includes positive mental states - not just the absence of negative ones
Most modern welfare audit frameworks incorporate Five Domains principles
The model is used by WSPA, RSPCA, and the OIE as a welfare assessment foundation

Welfare Considerations

The Five Domains model represents the current scientific consensus on what constitutes a complete welfare assessment. By including mental state as an explicit domain, it captures what the Five Freedoms implied but did not fully articulate - that welfare is ultimately about the subjective experience of the animal. An animal may be healthy and have adequate nutrition but experience chronic boredom, frustration, or fear - negative mental states that constitute welfare problems even without physical disease. This framework guides both welfare research and practical assessment, providing a richer tool for improving individual animal lives in any context.

What You Can Do

Use the Five Domains framework when assessing the welfare of any animal in your care
Share the Five Domains model with farmers, zoo staff, or other animal managers
Support organisations that use all five domains in their welfare assessments
Advocate for Five Domains adoption in animal welfare regulation and assurance
Engage with Animal Sentience Committee guidance that builds on Five Domains principles