So, I just moved South of Denver and my backyard backs up to a car lot across the alley way and during the day there are lots of truck noises, garbage trucks and just loud noises that go on during the day...well, those loud noises for some reason freak her out and she will not go potty in the backyard, let alone go in the backyard at all! She just stands by the fence and shakes. How do i show her that it's just a noise and that she is safe to do her business in the backyard?????????