Ditto, get her into a group class where she can get over the whole 'it's another dog!' thing. You can also see if there's some dog owners in the neighborhood that can help by walking past the house over and over while you pull out the good food and distract her. For that though if it was my dog, I'd just have a leash on and remove them from the window and work on not barking out the window. I'm not a fan of that at all though.
Also see if there's some dogwalking people in the neighborhood and then walk behind them, then beside and so on as she gets more used to other dogs. Dog daycare might be an idea too.
Also see if there's some dogwalking people in the neighborhood and then walk behind them, then beside and so on as she gets more used to other dogs. Dog daycare might be an idea too.