In article ,
Bill Spohn wrote:
I still think the electric fence is the easiest solution, or failing that a
rabid pit bull with an invisible fence to keep it on your side of the line -
and warn the neighbours that if their pooch ventures over the line he is fair
game - literally.......

My mother once handled a problem like this but in reverse. The neighborhood
in question was in the country, and each house had 3-5 acres, sometimes more.
A neighbor moved in about a quarter of a mile away who had a rather nasty pit
bull. It had killed one dog, but nobody actually saw the pit bull kill the
dog in question so nothing was done. My mother called the people and told
them, "If you continue to allow your pit bull to run around the neighborhood,
it might not go well for it. I have four german shepherds that would gladly
have a few minutes of fun with your dog." The owner permanently chained up
the dog.

-Geoff