Dog hair loss after mange treatment?

I have a blue heeler mix dog who about a month ago started having some severe itching, raw skin patches and hair loss. After a trip to the vet, the scraping revealed no mites but the vet suspected something. They put her on Simplicef for 7 days and a frontline type medication that is for fleas and demodex. Her itching is much better although not completely gone. Her sore spots are healing nicely. Her hair loss, however, seems to be worse. She is active and playful and after a good workout, her white fur appears extremely thin over pink skin. Her little ears are almost totally bare. There is no scabbing or raw spots, just pink smooth skin. I know that it will take some time for her hair to grow back but after what point of time should I start to be concerned about my bald pup?
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Hair Loss

Your dog may be hypersensitive to every day ecological things such components as components, plastic or certain substances. The signs of this in your dog include skin swelling or sore spots and common discomfort and damaging. As with the other allergic reactions, baldness in your dog can result from ecological allergic reactions.

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adequan canine