UPDATE: My girls are doing GREAT! I couldn't be happier. Today is the 10th day since I've had Sabra, the White Shepherd. I have been managing their time in the backyard (where I was having most of the problems) and they are doing so much better! I took the advice of everyone. I take them on walks together and head off any potential fights by keeping Sabra on a leash. She learned quickly that I won't allow her to bully Scarlett. She learned fast! She really is a special dog!