It might be impossible to believe, but these dogs were originally bred to be indoor monastery-sentinel dogs by Tibetan Buddhist monks. Yes, these tiny dogs are not scared off easily. If these dogs are left untrained, they can turn into aggressive little monsters.
Highly suspicious of strangers, they are eager to express their dissatisfaction with their owners. They can also be very stubborn and have been seen to lie flat on the floor without moving when they are not in the mood for walking.
Kishu
This Japanese hunting dog has been described as extremely courageous. They have powerful predatory instincts and can often be spotted hunting smaller animals. They were originally bred for boar and deer hunting.
If these dogs are not socialized well, they can easily become quite combative, but with the necessary training, they are devoted and protective dogs. If you end up adopting one, be wary when they meet strangers.
Shiba Inu
Essentially a popular companion dog, the Shiba still has a predatory instinct as it was bred as a hunting dog. The dogs do not take kindly to provocation and can show aggression, but above all, when expressing emotion, these dogs emit what is labeled as the "Shiba scream." This high-pitched scream can ward off unwanted guests and can also serve as a strong warning sign for mishandling.
The Shiba is Japanese (it is a Japanese breed!) for Brushwood, which is a type of shrub or bush that turns red in the fall. Many people believe that is what was kept in mind when naming the dog. On the other hand, in Nagano, an ancient Japanese dialect, Shiba also means small. Either way, this "Little Brushwood Dog" packs a punch.
Australian Cattle Dog
The Australian cattle dog also goes by the name “blue heeler” or “Australian heeler.” But whatever the breeder or the shelter calls him, he’s not the ideal fit for a brand-new dog owner.
They have a reputation for being stubborn and having energy to spare — not to mention a truly adventurous spirit and belief in their own invincibility that will leave you wondering how they'll injure themselves next. Additionally, Australian cattle dog owners must establish themselves as pack leader to promote a harmonious household.
Airedale Terrier
Notoriously clever and stubborn, Airedales are tricky simply because they’ve got a typical terrier temperament in a large dog body. Terriers are known for being independent thinkers and voracious predators.
While this can be cute in a Jack Russell, it can be tricky to manage with a larger breed like an Airedale. They are also quite vigilant and may be unfriendly to newcomers, which can be an additional challenge for owners who like to have guests.