A. My suspicion would be a flea allergy. The allergy response can intensify even if you do not find any fleas on her currently. I would use topical advantage or oral comfortis for flea control. I would administer every 3 weeks instead of every 4. Your dog also may be more comfortable with a short course of low dose steroids- enough to break the allergic cycle and make her more comfortable while you are managing the flea situation. This is my assessment without examining your dog, but I will say the area of hair loss is classic for this kind of ailment
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