Farmed Pig Positive Welfare Indicators: Measuring What Matters

Moving beyond harm reduction in pig farming requires defining and measuring positive welfare indicators — behavioural and physiological signs that pigs are experiencing good lives, not merely avoiding the worst conditions.

Key Facts

Pigs are among the most cognitively sophisticated farmed animals, with intelligence comparable to dogs
Positive welfare indicators for pigs include play behaviour, social exploration, rooting, and nest-building in sows
Play behaviour in pigs — running, jumping, and mock fighting — is reliably associated with positive affective states
Pigs show a pessimistic cognitive bias when kept in poor welfare conditions, similar to depression in humans
The Welfare Quality Assessment Protocol for pigs includes positive affect as one of four welfare principles
Pigs in enriched environments with straw bedding show 60-80% more play behaviour than pigs on bare concrete
Anticipatory behaviour toward positive events — tail wagging, vocalisation — indicates pigs can experience positive anticipation

Welfare Considerations

Positive welfare science for pigs has advanced considerably. Researchers can now reliably induce and detect positive affective states in pigs using behavioural indicators validated against physiological measures. A pig in a positive state shows relaxed ear position, a wagging tail, playful running, and exploratory rooting. A pig in a negative state shows drooped ears, tucked tail, social withdrawal, and stereotypic bar-biting. Welfare assessors are trained to recognise these differences during farm visits. The goal of positive welfare frameworks is not just to eliminate suffering but to ensure pigs can experience meaningful portions of their lives as genuinely good — engaging, stimulating, and socially satisfying.

What You Can Do

Choose pork products from farms certified to higher welfare standards that require enrichment and positive welfare assessment
Support pig welfare research organisations developing and validating positive welfare indicators for commercial farm use
Advocate for farm assurance requirements that include positive welfare metrics beyond basic health and mortality rates
Ask food businesses about their pig welfare sourcing policies and whether they require positive welfare assessments
Reduce pork consumption or shift to higher welfare sources to create economic incentives for improved farm standards