Cats are usually very loyal to their owners and can be standoffish to strangers so that may also add to that supposition. Dogs have been considered to be "man's best friend" for instance. They are loyal and brave, they also work hard at various jobs that both assist and protect us. There have been stories told over the years of dogs rescuing people in various ways and their bravery has never been questioned. Today dogs are trained in search and rescue, drug and other law enforcement and are helpers to the blind and handicapped.