Well I can tell you that our Huney has a little seperation anxiety but it's not half as bad as it used to be. I tried to ignore her but she just would cry more, but she would only do it when we were home and she was inside and we were out or visa versa. So now we just take her with us wether we're in the back yard or in the house.
Ok, so I know this didn't help at all, just wanted you to know I understand where you are coming from. I just think all dogs respond differently to different things so you just have to find out what's best for Lefty.