That is problematic when the dog just barks. We have neighbors who have a dog that, truthfully, I sometimes fantasize about feeding a poison hot dog to. This dog does nothing BUT bark, constantly. I've spoken with both the husband and wife about it and they basically blew me off (actually, completely blew me off). 24/7, this one dog barks. We've been their neighbors for over two years now, and this fucking dog still barks at me every time I go out front. It'll be midnight and I go to the toilet and I can hear this fucking dog barking through the vent that leads to the roof. It doesn't matter what's going on or what time of day it is.
Fuck you, Herb, fuck you.
There are times when I'll be out there watching him, and he's not barking "at" anything, he's just standing their facing up into the air and barking. I want to strangle the motherfucker, but more so his owners. And the thing is that the other two dogs they have ONLY bark if there's someone or something actually around. Not Herb, stupid ugly-ass motherfucking dog.
What makes it worse is that they're the only neighbors we're on friendly terms with, so I can't do a damned thing. I thought talking to them might help the situation, but when I get, "Well, he's my dog, not Roy's, and it's really Daisy who is the bad one." Um, no, dear, Daisy isn't the bad one, because she doesn't bark unless there's something or someone around. Herb is the bad one, and I loved it when he was in dog jail for a week because I got some fucking PEACE AND QUIET! And Roy's response is, "I want the dogs to bark so it keeps people away." Look, dude, a dog that barks just to bark isn't doing anyone any good.
I've taught my dogs that they MUST let me know when someone is near or on the property, ANYONE. I have a hard time getting the old dog to stop once I'm out there, but she's doing her job enthusiastically. They do not bark otherwise unless they're bitching at each other, and then it's more a yelp bark and we all know exactly what's going on (young dog is fucking with old dog). I know my dogs' barks and sounds, just as they know mine.
At least your dog is barking at SOMETHING, even if her barking isn't quite so useful to you.