3. Black Russian Terrier
Just as you guessed this breed originates from Russia and was once used as a military dog. This breed makes a highly talented breed for protection and intelligence because of its strict ability to sense many things due to its impeccable nervous system. This protective quality is a great adaptation that many families enjoy and its instincts make this dog one of the best for protection and defense. The dog breed typically has black curly hair and is about a medium sized, which is ideal as a family pet.