Research on pig cognition including potential mirror self-recognition and metacognition is reshaping scientific understanding of pig consciousness and its implications for welfare standards.
Pig cognition research has transformed the scientific basis for welfare advocacy over the past two decades. Each new finding of cognitive complexity in pigs, whether self-awareness, metacognition, or tool use, strengthens the philosophical case for treating them as entities with rich inner lives deserving strong moral consideration. The welfare policy implications are significant: animals capable of the cognitive operations being demonstrated in pigs deserve environments that provide cognitive challenge, social complexity, and agency rather than the cognitive impoverishment of current commercial standards. The gap between what we now know about pig minds and how we treat them in production systems represents one of the clearest moral challenges in contemporary animal ethics.