Tinyliny- I'll try it next time they're barking. Worth a shot.
Franknbeans- I've never seen one of those, I wonder how it works. Maybe it senses a loud sound (bark), then puts out a high-pitched sound? I'll look into it.
Viranh- I think I might. I know we're not perfect neighbors, and neither are they. I don't want anything bad to come down on them, but I want to be covered legally, in case it happens again. I did look it up, you can shoot a dog if you see it attacking livestock. Not sure about them just being on your property. I'll keep it in mind.