Cavs are too trusting and eager to greet newcomers to bark at intruders.
Cavalier King Charles Spaniel
Berners are more likely to lean on an intruder looking for pets than scare them away.
Bernese Mountain Dog
Sweet-natured retired racers will sprint away from trouble rather than defend.
Easygoing Bassets are too mellow and interested in scents to make good guards.
Beagles are amiable and curious hounds that prefer playtime to protection duties.
Despite intimidating looks, Bulldogs are too relaxed and friendly to fend off threats.
Goldens love everyone and are more likely to assist an intruder than deter them.