I'll have to keep the barking trick in mind. It does seem like it
should work, and I also have a pretty good bark; guaranteed to make
any dog stop and look where the dog is!

It really messes with them. As a young lad we had a neighbor with an
incessantly barking dog. Frustrated, I walked up to it with a bullhorn and
barked back. It gave me a quite confused look and walked away, never to
needlessly bark again.