Agree on the dog bowl tactic. I also have a 'Beware of Dog' sign on my backyard fence.Roland, good job in recovering to situational awareness mode. I would take most of the suggestions offered here and put them into practice. Another offering-go out and buy two LARGE dog bowls. Write names on the side of the bowls. Put one in the garage in plain sight but out of the way of your vehicle. Put the other near your back door. I have done this for years before and after I put up a privacy fence. I have watched from inside, through a window, as strangers approached the house. They see the bowl and head another way away from my house. Spike and Pete live on.