I would add fish oil and coconut oil to her diet. Most people seem to squirt Grizzly brand salmon oil on their dogs food, but that could potentiallly go rancid after a few months, so I just squirt the contents of a fish oil capsule on my dogs food. I also feed her a teaspoon of coconut oil a day. She should probably get more coconut oil, but she will stop eating after a couple of days if I give her more than that. If you are feeding a less expensive dog food you should switch to a better brand, or go with frozen food such as Stella & Chewy's, Primal or Natures Variety. I feed my dog Orijen regional red. I also brush my dog daily with a Zoomgroom brush to remove shedding hair and distribute the oils. I also give my dog daily "Probiotic Miracle". Some people also rub in coconut oil to their dogs fur, but that's a bit messy, so I don't do it. You can also spray fur with a solution of half and half apple cider vinegar and water to kill yeast. You can also bathe the dog with Curaseb shampoo ( or similar products ) twice a week for 4 weeks, then once weekly thereafter if all the above didn't work. The shampoo kills yeast and bacteria on the skin.