[YEA] My border collie has a thick, long coat and by the time I noticed that a big spot on her back was flaking badly, the ringworm had already gotten hold of several areas of her body. I believe she got it from swimming so much with my son this summer (being wet all the time).
I first tried organic coconut oil with a few drops of tea tree oil mixed in and liberally applied twice a day. I also bathed her in a tea tree oil dog shampoo every 2 or 3 days. She got colloidal silver in her water daily, as well. It helped, but was not knocking it out as fast as I thought it would and was messy with all that oil on her (she is a house dog).
After several weeks of this, I got on here and read about Borax laundry soap and decided to try that. So I mixed up about a half cup with a huge pitcher of warm water and dumped it on her in the bath, worked it into her coat, and let it sit on her for a few minutes before rinsing and then following with the usual dog shampoo I'd been using.
I was quite surprised to see that the spots looked much better the next day. The redness was pretty much gone and the swelling (the "rings") was down. So I decided to use that on her topically twice a day instead of the other stuff I'd been using. I put about a half teaspoon into a very small bowl, added about a teaspoon of hydrogen peroxide (per this site), and the rest water. I applied twice a day and continued to bathe her every other day, mostly for the nasty flaking problem.
She is now much improved, with hair growing back, after a week of this, but I'm going to continue so that it doesn't come back. I also started giving her black walnut twice daily (one capsule mixed in with each meal) to treat from within.
I mix up some Borax with water in a squirt bottle and spray my carpet and rugs with it periodically, and I wash her bedding daily too, just in case. So far no one in my family has gotten it.
I told everyone I know about the Borax, especially those with kids, since ringworm is a common problem with them, and is so contagious. I wish everyone the best of luck!