When dogs are members of the family, they instinctively protect the family members. Even if they aren’t official “guard” dogs and aren’t trained as protectors, they will alert the family to intruders or strangers day or night! They hear better than we do. They see better than we do. They can smell danger – and they bark!
This picture from UtterlyCute.com is priceless – a patient, loving dog protecting a child.