Alaskan Malamute

• The Alaskan Malamute is one of the quieter dog breeds although it will sometimes howl. Strong training will help to curb any howling to make the dog quieter and only vocalize when needed. It is a large breed with a wolf-like appearance that exhibits strong loyalty and affection to its owners.
  
  

Black Russian Terrier

• The Black Russian Terrier is a natural guard dog, but even so rarely raises the alarm unless it is necessary. When it does bark, it is loud due mostly to the dog's large size so it works as a deterrent to potential intruders. It is a large, shaggy-haired breed with a black coat and a playful personality.
  
  

Borzoi

• The Borzoi, like all sight hounds, tends to be quiet as the nature of their hunting style requires silence. The dog rarely barks unless totally necessary. It is a tall, slender breed with a thick, long-haired coat. It has a strong hunting instinct, so it is not good around other smaller pets and is generally bad off the leash in public.
  
  

Glen of Imaal Terrier

• The Glen of Imaal Terrier does not use its voice unless it senses danger. Socializing the breed is therefore vital so that it does not see danger where there is none. It is a medium-sized, sturdy terrier with strong hunting instincts and is not good around smaller animals. It is otherwise gentle with its family and a devoted pet.
  
  

Mastiff

• If the Mastiff barks you will know about it, but it is a rare occurrence. The dog's pure size announces its presence so it rarely bothers to bark unless it is warranted. It is a gentle giant who loves its owners and will protect them staunchly, without being overly aggressive. A mastiff is most likely to corner an intruder and hold them until someone comes.
  
  

Greyhound

• The greyhound is a tall slender breed that is a sight hound, so it seldom barks, if at all. It can be a problem around smaller pets such as cats which, if improperly raised, the dog may attack. Dogs bred and trained for racing are most likely to kill small animals, while conformation show dogs are calmer and less likely to hunt.