Providing cognitively stimulating enrichment for pigs is increasingly recognized as essential for positive welfare states, not just absence of suffering.
Pig cognitive enrichment represents the frontier of farm animal welfare practice - going beyond preventing suffering to actively promoting positive mental states. Pigs provided with cognitively challenging enrichment - puzzles requiring problem-solving to access rewards, novel objects requiring investigation, social play opportunities - show behavioral indicators of positive welfare states including play, optimistic cognitive biases, and exploratory behavior. The challenge for commercial farming is providing enrichment that remains engaging over time - simple fixed enrichment habituates within hours. Variable, complex enrichment that matches pigs' cognitive capacity provides genuine welfare benefits while demonstrating what welfare-positive pig farming can achieve.