Thanks everyone for your suggestions. I was trying to avoid calling the police, but it looks like that really is my only option. If you don't consider the possible harm to the dogs, it really is kind of funny. The neighbor, who doesn't speak very much English, enjoys talking to the dogs through the fence. (before we closed all of the gaps under the fence, she used to pet their heads when they poked them underneath) I think she is trying to be nice, though I don't much enjoy picking up all of her trash. She really has gone to pretty extreme lengths to keep feeding them, as we have gone to equally extreme lengths to prevent that.