I think in all thirteen years that we had Ed, he only barked a handful of times, and scared himself when he did it. LOL. I think that is why it frustrates us with Yenta so much now.
Thanks for the advice, I will look into the collar. If we can use it only when she goes outside that would be great! As for strangers, it is when we are inside that is when we are looking for "protection" the most.
The others are shock collars. The cheap ones you buy at the PetSmart and such places are not really good. They tend to "go off" at the sound of a tag on a collar (be sure to remove any other collar) or other metallic sounds. I've had some "false alarms" with them and it doesn't really seem fair to the dog.
Tri-tronics (the people who make the high end retriever training collars) make a very good bark collar that not only doesn't go off when it shouldn't, it counts the number of times your dog barked and was corrected while you were gone. It also has an adjustable level of stimulation, so if you come home and find your dog barked and was corrected 50 times, you can raise the level a little, where if on the other hand he only barked once, you can lower the level, and so forth.
There are also some less expensive adjustable bark collars made by other training collar manufacturers, like DogTra, SportDog, and Innotek. I have TriTronics training collars myself, have had bad luck with Innotek, but know plenty of folks who use the Dogtra. That and TriTronics seem to be the brands favored by the pro trainers.
If you want a link to a good dealer, let me know. I have a couple of folks I've dealt with in the past.