Hey Diane!

In my experience it only takes a few days for the skin to heal provide you are nipping the yeast in the bud. You might consider Ted's Borax protocol for a systemic yeast infection:

Posted by Ted (Bangkok, Thailand) on 12/12/2014

The borax dose is the same regardless of the weight of dogs. In the end small dogs drink less than large dogs. The only difference is the sex of dogs which the female dog requires half the dosages male dogs.

So a female dog is always 1/8 teaspoon per liter dose. And male dogs is 1/4 teaspoon per liter water. Weight is irrelevant.

Timing:
Borax dosage for 1 week. Then 1/2 dosage in week 2. Stop for 1 week. Resume.

or

Borax dosage for 4 days, then no borax/water for 3 to 4 days. Continue on/off schedule until ailment clears.

Some reduce the dosage depending on weight of dog to prevent side effects but just know that beneficial effects will also take more time to see results when you reduce the dose.

This is most common dosages, just use common sense. Yes borax can be use for many unexplained conditions of dogs and human for simple reason that most unexplained conditions that cannot be cured with bacteria in majority of cases is fungus or parasites which borax does well but also is essential nutrient for the bones and hormones in mammals.

This modified dosaging has already explained long ago but that posting has been forgotten. Yeast infection and fungus and molds is also treated with borax. But there are other remedies but they not easy to find. Ted

You know something very curious, I have used Boric Acid, 20 Mule Team Borax for everything except for washing the body, but to get to the point, my dogs have fleas, but I didn't want to use any chemical on my babies, so I was curious about using 20 mule team for washing my dogs, so I just posted it in my search bar and what it brought up, you can imagine. In capital letters WHOA, WHATEVER YOU DO, DO NOT USE BORAX ON YOUR DOG!!! How do you like that? Anyways, bottom line, I am giving them a bath in Borax.

I like "Natural Chemistry" Flea and tick Shampoo..works great..they die from the cedar, cinnamon, clove oil...then of course the borax dips. Little apple cider vingar and garlic in food. You will get it solved with all the great help here. I don't use any chemicals either.