Farmed Animals

Pig Emotional States: What Research Reveals

Research into pig emotional lives reveals capacity for joy, curiosity, and frustration alongside the more studied negative emotions.

Key Facts

Pigs in positive environments show ear posture, tail position, and exploratory behaviors indicating positive affect
Pigs given novel enrichment show play responses including running and jumping indicating excitement
Anticipatory behavior before feeding is faster and more vigorous in pigs with access to enrichment
Pigs form clear preferences between individuals and between environments based on past experience

Welfare Considerations

The discovery of positive emotional states in pigs — not just the absence of suffering but the presence of pleasure, excitement, and curiosity — has transformed welfare science. Environments designed only to prevent negative states miss the welfare goal of enabling positive ones. Pigs that play are communicating satisfaction. Those that explore with interest are thriving. Welfare science now asks how to maximize these states, not just minimize the opposite.

What You Can Do

Support farms demonstrating positive welfare indicators including play and exploration
Advocate for positive welfare metrics to be included in welfare assessment protocols
Choose pork from systems that explicitly aim for positive welfare beyond minimum standards
Support research identifying the environmental conditions that maximize positive pig emotional states