The Karakachan belongs to the rare
livestock protection breeds. The dogs are effective at flock protection against predation and theft. Since 1998, there have been three cases of successful
predator attacks in the flocks provided with dogs for this project. In one flock of 650 sheep, four had been killed, but this was due to the
shepherds dividing the flock in half during grazing, and one half had been left without dogs. The Karakachan dog is strictly territorial. It accepts the flock as its territory, wherever it is. Being close to the flock, they become visibly aggressive if the flock is threatened. If a stranger tries to remove an animal from the flock, the dogs will become seriously aggressive. However, when a flock is passing through a village the dogs walk calmly without paying attention to people. There is another reason for the lack of accidents: the tradition of guarding
livestock with big, aggressive dogs has always existed in
Bulgaria. Everyone knows about them and people simply avoid the flocks, so conflicts do not occur. Also there are dogs, which are not really aggressive towards people, but in the same time are excellent guards against other animal
predators. The trends in
breeding these dogs are to produce offspring less aggressive towards people. ==Creation of new breeds==