It is not accurate to say pigs are smarter than dogs. Both species are intelligent in different ways.
Dog Strengths
Dogs are generally more trainable, excel at obedience, read human social cues well, and communicate effectively with people.
Pig Strengths
Pigs are adept at problem-solving, have excellent memories, and display complex social intelligence and empathy.
Comparing intelligence is difficult because different species excel in different areas, and there is no universal measure across species. Both dogs and pigs are intelligent animals with unique strengths.