Chow Chows often rank as the least intelligent dogs. They are independent and stubborn, making training a challenge.
Basenjis score low in working/obedience intelligence. They are aloof, headstrong, and not motivated by praise or food rewards.
Bulldogs struggle with training, ranking low in obedience/working intelligence. They are free-thinkers who get distracted easily.
Afghan Hounds are the "dumb blondes" of the dog world. They are beautiful but aloof and independent thinkers.
Borzois are stubborn and strong-willed. They are difficult to train and ranked low in working/obedience intelligence.
Pekingese often prefer to be ornamental lapdogs over obedient working dogs. Their regal independence makes them aloof.
Mastiffs can be challenging to train consistently. Their protection instincts override taking commands.