Which dog breeds rank lowest in intelligence? Understanding canine IQ

The dog breeds consistently ranking lowest in intelligence tests include Afghan Hounds, Basenjis, Bulldogs, and Chow Chows. These breeds tend to score poorly in working/obedience intelligence, which measures how quickly dogs learn commands and solve problems. However, 'low intelligence' in dogs doesn't mean they're incapable - these breeds simply have independent natures and were bred for purposes other than following instructions. Many excel in other forms of intelligence like instinctive or adaptive intelligence.