I recently had my Scottish terrier groomed. She came back smelling wonderful, but within several days began scratching furiously and developed terrible dandruff. I tried to wash her with Keratolux which I purchased a while back, but now she is worse. What should I use to clear her up? She's had this problem before, but I have always been able to clear her up. This time I can't seem to get it under control and she stinks.