Scientific research shows that pigs have higher IQ than dogs, that is, pigs are smarter than dogs. But why do people think pigs are stupid and dogs are smart? Although a pig has a high IQ brain, his body doesn't match his brain and the actions he wants to do, so he looks stupid, so people think he is stupid. Although the dog's brain is not as smart as the pig's, its body is flexible and it can cooperate with the brain to do what it wants, which makes people feel smart and lovely. So in terms of brain intelligence, pigs are smarter than dogs.