I was just wondering about this a little, so excuse me not really offering any real help. I really hope your problem gets better as she gets older.
Can I just ask anyone here whether this problem can be aided by (terrible thought!) having more than one dog? Can they be a comfort to each other or is it just silly talk? You see, I can see that Ruscha is going to have this problem if ever I have to leave her for any reason and I am rather dreading it. It makes me feel ill if she screams for any reason (usually another dog treading on her toes).
What bothers me most is that she hates it when I go out to the garden without her, but she's quite happy to chase off into the distance with strange dogs! It's just double standards!