I am so glad Greycie is back home. I lost my Peanut once, but only for 6 hours. He too, regressed back. It only lasted a couple of days then he was back to normal. I have noticed and even tested it out, he won't go anywhere near the door now. It has been at least 3 years since it happened and he still won't go near the door. Maybe Greycie will hate the door too.