Video of 3 guard dogs being put to the test by a guy wearing a bite suit pretending to be a thief; a Cane Corso, a Belgian Malinois, and a German shepherd. The Cane Corso barks but then runs from the intruder once he is in the house, the Belgian Malinois who "was trained for protection" still hesitates and then only attacks once the owner has to make him, but the German Shepherd who was NOT protection trained attacks the guy once he gets about 10 feet in the house and stays on him till he retreats out the door, that is true, natural protection! The GSD owner said she was upset he let him get that far in the house, but i think that was the German shepherds intelligence... he was analayzing to see the guys intentions.. important because it could have been a fireman or rescue worker, but once he saw bad intentions, he made a move! German shepherds are by far the most superior guard dog, period!