It has more to do with the owners than it does the breed of dog. If you fulfill the dog's instincts, the dog, no matter the breed, will be less likely to bark. I know there are some breeds that may have a tendency to bark more than others, but it really has more to do with the human behind the dog. A restless dog is more likely to bark more. A dog that is well-exercised, tired and secure is going to bark less.