As so many of house have dogs that tend to get each other going with the help from the occasional coyote, I have a solution to keep the neighborhood a little more peaceful.
http://www.amazon.com/Lentek-PC06G-Bark-Free/dp/B0001MYNLY/ref=sr_1_4?ie=UTF8&s=home-garden&qid=1253145420&sr=8-4
It is a high pitched noise (we can't hear it) that is emitted each time the dog barks. I have no affiliation with the sales of this product except that I bought one and it really really works. I still have the occasional single bark, but it is very rare.
Definitely a humane solution.
Subject: Barking Dogs of the Dell.. 
Thu Sep 17, 2009 7:59 am