Research into pig cognitive abilities including tool use and problem-solving has implications for enrichment design and the ethical treatment of highly intelligent farmed animals.
The cognitive sophistication of pigs creates a profound ethical tension with the conditions of most industrial pig farming. Animals capable of tool use, learning abstract tasks, and forming individual social relationships experience barren, overcrowded environments not merely as physical discomfort but as chronic cognitive deprivation. Behavioral studies using ear angle, tail position, and play behavior as positive affect indicators show that cognitively enriched environments produce meaningfully better welfare states — not just less suffering, but positive experiences including curiosity, exploration, and play.