nice thing is you don't need mean dogs. I came home about 0800a (about 25 years ago) saw inner city type (we lived in ghetto) explaining to my white 80 year 4'5" grandmother he was looking for a friend that supposedly lived there...with my grandmother. 5 very friendly dogs, waiting at door, just staring. no snarling, no barking, no lunging, just quiet staring. Just as I arrived he turned around and decided to leave. Dog maintenance worth every hassle to avoid broken hip to granny.