I would correct her strongly for even staring....make her think the world is coming to an end....put a prong and a long tab on her and as soon as she postures....take ahold of her and use your voice STRONGLY....and repeat if necessary...let her wear the prong and tab for a while....I had one female who only needed 2 strong corrections and lived for years peacefully afterwards....
Caution - will not work with every dog...but it is the first step I'd try.
Thanks Lee .... I know I need to get a handle on this ASAP. It is not fair to Bella walking around in fear. Thanks for your input!
Bella 10-31-2012 Shepherd/mix rescue
Zoe 11-21-2012 GSD
Moe. 10-1 -2013 GSD