A guard dog, an attack dog or watch dog is a dog used to guard against, and watch for, unwanted or unexpected people or animals. The dog is discriminating so that it does not annoy or attack familiar people.
Read more about Guard Dog: Barking, Breeds, List of Breeds Commonly Used As Guard Dogs, List of Other Guard Dog Breeds
Famous quotes containing the words guard and/or dog:
“Harsh necessity, and the newness of my kingdom, force me to do such things and to guard my frontiers everywhere.”
—Virgil [Publius Vergilius Maro] (70–19 B.C.)
“A dog starved at his master’s gate
Predicts the ruin of the state.”
—William Blake (1757–1827)