Great story and great dogs, I have staffies and they dont half protect the home, anyone can walk through the door with me and they are fine but I locked my keys out and had to get a ladder and go through the window. I put my head in and they came flying at me growling until they realized it was me. Guess they just know that people who are supposed to be in the flat dont come in through the window.
Do your dogs recognize your footsteps? Mine know when its me coming up the stairs, They dont bother with anyone else but when I come up they are running round by the front door