I have a dachshund who has had a terrible problem ever since I got her as a tiny puppy. She simply cannot be left alone, even for just a few minutes, because she urinates on the carpet in front of the door and also is totally traumatized. I tried shutting her into the kitchen and also crating but she deficated all over the crate and herself. Poor thing. I have tried all of the recommended methods and nothing has helped. I now have to either take her with me everywhere or leave her with my mother. She is definitely a special needs child, in more ways than one, but I adore her. You and the dog have my sympathies. It must be hard for them to be so terrified.