My situation isn't as dramatic. I'm also rural, on ~50 acres and have some relatively new neighbors. I like them. They have a young dog that I also like, a real sweetheart up close, but the fucking BITCH never shuts up from any distance. She just doesn't seem to be able to differentiate between serious threats and the guy next door walking around outside his house (me), much less giving me any peace roaming out in the woods or especially around the lake. I used to say/yell hi back, but now I usually cuss (bark) back because frankly it's unpleasant. The one thing that seems to really set her off is a lack of acknowledgement so I feel compelled to react somehow, it also lets the owners know my displeasure.
I had a couple of older labs when they first got here that helped buffer the situation, but they died off and now it's just the cat. And the cat has actually chased this dog off, she's no actual threat at all just noisy; it's almost as funny as it is annoying. I have an old greenhouse on the 'eastern front' that I have put a bb gun in, I shoot close enough to her to scare her which really shuts her up, but this has only worked a couple of times because I have to take her by surprise -- if she hears me pumping the gun she scurrys off. And continues to bark at me incessantly at all other times, basically whenever she can get away with it.
The owners do seem to be trying to correct her/reel her in, but she's stubborn and it's like a game to her I think. I got on a research tangent, there's a ton of sonic deterrents/training aids. Basically electronic squawk boxes and whistles emitting extremely high frequencies. And most of the products are are shit, according to the reviews. But wading through them one product seems to stand out, it's a whistle that is:
- non-adjustable
- inaudible to humans
- excellent over long distances
This is the only one that met all three of the above criteria, and coincidentally got way better reviews than the rest of these products. Without going into why these 3 features matter, here's a picture and a link:
http://www.amazon.com/gp/product/B00PXYRC5Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
It might be worth trying a whistle, before deploying the chemical or gun-powdered weapons yes?
It will probably be at least a week before I get to try it, but I have high hopes