Pigs are among the most cognitively sophisticated farmed animals. Research into their intelligence has profound implications for understanding their welfare needs in commercial systems.
The growing body of cognitive research on pigs challenges any framework that treats them as simple stimulus-response animals. Their sophisticated social learning, emotional states, and cognitive flexibility mean that factory farming conditions — barren environments, social instability, inability to root or explore — cause genuine psychological as well as physical suffering. A pig that can learn from observing others, remember locations, and respond to the emotional states of conspecifics is an animal with rich inner experiences that our current farming systems systematically frustrate. This cognitive evidence does not make welfare improvement easy given the economic structure of pig production, but it makes the ethical case for improvement much stronger and more urgent.