Had a friend that had a large white shepard. You were OK when you went in the house, the dog sniffed and left you alone....one night they came home and found the side door open, the kitchen and living room had blood and blood trails, the dog was quitely sleeping in his bed...did his job and went to sleep. Nothing was missing from the house, just some blood from the crooks was missed
My favorite is the German Shepard. Always has been, always will be.