I agree with some of your post LOL ... which is why I added dogs in a living room window. My neighbour has two cairn terriers that go absolutely ballistic when they see Kyleigh outside. They are in the living room window ... you can hear them clearly, and you can also hear the window rattling (good thing they're small LOL). Is it mean to the other dogs? Personally, I wouldn't leave my dogs out in the house to bark constantly at every single thing that walks by (which they do), and for a 30-45 second time period that I'm working with my dog, I don't really think it's mean to the other dog.
The first couple of times Kyleigh heard them she barked back. I took this opportunity (my neighbours were NOT home at the time to hear their dogs) to simply stand in my driveway, have Kyleigh in a sit and looking at me.
She would look over, but if she barked I gave a quick correction on her leash (martingale) and said NO BARK.
After three sessions of this she doesn't even look over to that yard / window when the dogs are barking at her. She simply ignores them because I let her know that they weren't a threat.
I agree that with fence, it can cause the other dog to become more aggressive ... but the dog behind the fence will USUALLY only get more aggressive if there is a response from the dog on the other side of the fence.
Kyleigh and I walk past numerous fenced in dogs and I did the same thing with her. I would stop for a couple of seconds and have her sit. If she turned to bark / charge the other dog, a quick correction / leave it, and we would move ahead 10 feet and then I would have her sit again. 10 seconds later we move on.
Do the people appreciate me "teaching" my dog with their dog? Honestly, I am not really there long enough ... 30 - 45 seconds and we are moving on.
Now, please keep in mind, I did this with Kyleigh as a puppy ... no "previous" experiences with her to work through, so training her was much easier than a dog that had already displayed issues on leash / charging, etc.
This was why I suggested that the OP contact someone that has a dog on the other side of the fence so they could both work it through.
Marionís Zoo-Kyleigh, Raylan-cat, Echo-TAG,