My German Shepherd has skin allergies, we know that she is allergic to hay and flea bites out of process of elimination. We are in the process of switching her to a holistic food. The vet has prescribed Prednisone to help with the excessive scratching, biting and cleaning but it really knocks her out (she even wet herself while sleeping while on it). My question is how often should I bathe her? The excessive cleaning causes her to stink really bad, and I recently had a professional groomer bathe her with a very good (very expensive) shampoo, and we noticed that this held off the excessive scratching, biting and cleaning for much longer than we have ever observed before! I just don't want to over do it and make things worse.