Research consistently demonstrates that pigs have cognitive complexity comparable to dogs and even primates. This intelligence has profound welfare implications for how they are housed and managed.
Pig intelligence welfare creates a profound ethical inconsistency: we acknowledge dogs as intelligent enough to deserve legal protection from suffering while keeping pigs — demonstrably of similar cognitive complexity — in conditions that would be criminally prohibited for dogs. The intelligence of pigs makes their suffering from boredom, frustration, and monotony qualitatively worse than for less cognitively complex animals. A pig in a barren gestation crate is not merely physically confined — it is cognitively imprisoned, unable to investigate, problem-solve, play, or engage in the social learning that its brain is capable of. Confronting the intelligence reality of pigs is one of the most important contributions animal welfare science can make to informing public and policy responses to factory farming.