Positive Welfare Indicators in Pigs: Beyond Absence of Suffering

Emerging research on positive welfare in pigs reveals that these intelligent animals are capable of experiencing positive emotional states — joy, curiosity, and contentment — that can and should be promoted in farm management, not merely minimised suffering.

Key Facts

Pigs show clear behavioural indicators of positive emotional states including play behaviour, rapid exploratory locomotion, and relaxed ear posture
Play in pigs — including running, jumping, and play-fighting — occurs spontaneously in animals with adequate space and social opportunity and indicates positive affective states
Research at Bristol University has demonstrated that pigs in enriched environments make more optimistic judgements in ambiguous cognitive tasks — a validated measure of positive mood
Pigs show anticipatory excitement before positive events such as feeding or access to novel enrichment — a reliable indicator of positive emotional state
The Five Domains model of animal welfare, now widely adopted, explicitly includes positive experiences as a welfare goal alongside minimising negative ones
Commercial pig farms can be assessed for positive welfare indicators including play frequency, social investigation, and exploration using validated on-farm welfare protocols
Pigs given outdoor access or deep-bedding systems consistently show higher rates of positive welfare indicators than those in barren indoor systems

Welfare Considerations

The emerging science of positive pig welfare transforms what we should be aiming for in pig farming. It is no longer sufficient to ask "are pigs suffering?" — we must also ask "are pigs experiencing positive states?" A pig that is free from pain and disease but has no opportunity to play, explore, or engage its considerable cognitive abilities is not experiencing good welfare even by the absence-of-suffering standard alone. Pigs are playful, curious, socially complex animals who, under appropriate conditions, clearly experience something resembling joy and contentment. Farming systems that enable these states — through outdoor access, enriched bedding, stable social groups, and space to run — produce genuinely better welfare outcomes and often also better production performance.

What You Can Do

Support pig welfare standards that include positive experience requirements, not only minimum negative experience prevention
Purchase pork from farms certified to higher welfare standards that include outdoor access or deep-bedding enrichment
Advocate for positive welfare indicators to be incorporated into farm assurance scheme assessments
Support research into pig cognitive and emotional wellbeing — this science is driving improvements in welfare standards globally
Share evidence about pig intelligence and emotional capacity with others — changing public understanding drives demand for higher welfare products
Engage with pig farmers and farming organisations about the evidence base for positive welfare and its production benefits