 I don't know why you can't have a conversation, a civil conversation with these neighbors. If you are unable to do that, maybe drop a note under their door. And the other possibility is that the dog is outside barking and barking and barking as people walk by, as squirrels run by, all of that, right? We've all seen that. Dogs in yards. They can't get out of the yard. Maybe the yard is fenced in. Maybe they have an invisible fence, which I hate those sorts of things.