With my bf being in law enforcement and having had the police dogs with him for several years, we joke about Buddy quite often. First, he doesn't bark unless it's an actual knock on the front door (back door and window's don't work). Then, it's so low toned, the person on the other side can't possibly hear it. However, he can sniff out a dryer sheet in any size mound of laundry. So, we figure if they need a boxer for a drug dog, they'll have to train with dryer sheets! He watches over them as much as he does us if someone is at the door.