The only complaint was every time I opened the door she would run like heck. I have talked to many owners of Westies who have said the same.
Yep. That's quite common. Even happens with obedience trained westies. Chasing prey is so instinctive, that all other "unnatural" acts go right out the window. Westies must be on leash when not fenced. Too many sad tales of those who did otherwise.
btw, you should see the "anti-escape" mechanisms around my house to prevent just that. :-)