Pigs are among the most cognitively complex farm animals. Understanding their intelligence raises important ethical questions about the conditions in which most pigs are kept.
The cognitive sophistication of pigs creates a moral obligation to consider not just their physical health but their psychological wellbeing in production systems. A pig that is healthy in the narrow biomedical sense but cannot explore, problem-solve, form social bonds or exercise agency is in a welfare state that its intelligence makes all the more significant. The contrast between what we know about pig cognition and the conditions in which most pigs are raised represents one of the most significant ethical contradictions in modern food production. This cognitive evidence strengthens the case for enriched environments, social housing, species-appropriate behaviour expression and ultimately higher welfare standards as the ethical baseline.