When I lived in NYC in 1970, I remember lots of people with Afghan hounds. They look like glorified mops.
But most of them are incredibly stupid, to the point of being almost untrainable.
This article appears to back me up, here's the tail of the list:
Lowest Degree of Working/Obedience Intelligence
70. Shih Tzu
71. Basset Hound
72. Mastiff
Beagle
73. Pekingese
74. Bloodhound
75. Borzoi
76. Chow Chow
77. Bulldog
78. Basenji
79. Afghan Hound
Some friends of mine had a Shih Tzu, they were unable even to housebreak the beast.