One of the major factors that makes prospective pet owners balk at bringing a dog into their home is noise. Just the thought of staying up all night listening to a dog howl and bark at the moon is the stuff of nightmares. But celebrity dog trainer Joel Silverman says not all dogs are created equal when it comes to the amount of noise they make. "I am asked periodically if there are breeds that are less noisy, or dogs that do not bark as much. And the answer to that is yes, there are," he said. Silverman says the quietest...