with the Beware of Dog sign approach.
I'm off to buy one now.
Meter reader came into our back yard unannounced, through a closed but unlocked gate, my dog bit him! Surprised me. He apologized and admitted he was in the wrong. Fortunately not a serious bite we just had to show proof of rabies vaccine. Not to hijack the thread but I will get that sign now both as a deterrent and fair warning.