My dog isn't supposed to be a guard dog, but she barks like crazy any time a car pulls into the driveway or when someone comes to our door. She never bites but barks like mad. we have tried the noise making collars, we have tried the little box that emits sounds when she barks, we have tried making her stay in one spot in view of the door, but a few feet back... nothing has worked... it would be nice if she didn't always bark when someone comes to the door because it scares little kids and makes everyone in the house jump when she first starts. She seems to know she is doing the wrong thing but can't help herself or just doesn't want to stop.