Last month I called a mobile groomer as I had the flu. Ten days or so later my dog developed mange. He is 14 and has never had skin problems or issues with my regular groomer. The past four weeks have been hell really, washing him every other day, shaving him down. The initial site on his back is significantly improved, was horrible. He now has smaller spots everywhere, but look like they are in a healing phase. I have alternated Teds treatment within borax/hydrogen peroxide with shampoo, mange shampoo from Amazon and head and shoulders. For severe spots have covered them in honey, alternating on non bath days with apple cider vinager. The honey was amazing, suffocating them. He is getting better but not cured. I am told it can take twelve weeks or longer. Has been hard on me and the dog. But we are making progress. I may go then Vet for Ivermectin to help speed up the process. I also put small volumes of apple cider vinager and borax in his drinking water as instructed by people with experience. Keep it up. Takes a while.