In the early times, ancient people use to live in camps. They learn to domesticate the dogs because of the several benefits that they can get from doing it. The dogs would alert them in times that there will be some predators or strangers near their camp.
Akita, Rottweiler, Doberman pinscher, Bull Mastiff and Mastiff, Great
Dane, Boxer and Giant Schnauzer. German Shepherd-breeds
Anxious, demanding, dominant, protective, sensitive, loyal,
great obedience dogs