Pigs demonstrate cognitive abilities comparable to dogs and young children — including problem-solving, self-recognition, and emotional complexity — with significant implications for how we understand and address their welfare needs.
Pig intelligence has direct welfare implications. Highly intelligent animals with rich emotional lives suffer more from barren environments than less cognitively complex creatures — they experience boredom, frustration, and complex social stress in ways that demand higher standards of environmental enrichment and social management. A pig in a barren concrete pen does not merely lack stimulation; it is actively frustrated by the gap between its cognitive capacity and its impoverished environment. Understanding that pigs recognize individual humans, remember past experiences, and have emotional responses comparable in complexity to dogs fundamentally challenges the moral calculus of intensive pig farming. These cognitive capacities also provide the basis for positive welfare approaches: pigs can be trained, can engage with complex enrichment, and can experience genuine positive states when appropriate conditions are provided.