All dog breeders believe that the breed of their dogs is the most intelligent, noble and almost holy. And indeed, dogs are able to give their owners a lot of fun and even good. Some studies have shown that marriages between dog owners are stronger than ordinary ones. In addition, dog breeders are 4 times more likely to survive a heart attack. Despite the fact that they are all capable of being excellent pets, one should not consider them to be intellectually equal. Canadian psychologist Stanley Koren, with the help of hundreds of animal trainers and veterinarians, developed a special canine IQ test that would determine how smart your pet is. He assessed their ability and willingness to execute teams and solve problems. As one of his tests showed, if the dog can not understand how to get rid of the blanket thrown over her head, then she is not likely to be able to find her house if she accidentally breaks off the leash.
According to the scale, dogs that score 54 points or more have brilliant intellectual abilities. But today we will introduce you to those breeds that scored 18 points or less, which is demonstrated by their relatively undeveloped intellectual and adaptive abilities. However, it is worth noting that most such breeds were bred for purposes that do not require high intelligence, such as hunting and pretty.
- Shih Tzu

The American Kennel Club awarded this dog breed 15th place in popularity in the US. Shih Tzu is among the dogs that lack intelligence and learning due to the centuries-old history of the breed, which for a long time was considered the favorite breed of royalty. Dogs of Shih Tzu breed belonged to almost all members of the Ming dynasty, who ruled from 1368 to 1664. They needed only a kind dog, without any claims to intellect.