My dog has ringworm 😭😫 HELP

A few days ago I noticed a red spot on my dogs neck. Well, it’s ringworm 🙃

The problem is, I can’t get him an appointment with the vet to get any medication for him until Saturday so until then, I have looked up a more natural method to clear the infection and take away some of his discomfort. From research I have found that Apple cider vinegar can do those things.

Now here’s my dilemma. My other dog WILL NOT leave him alone. He is constantly licking the spot where his ringworm is trying to clean it for him. I have to separate them when I put the ACV on him so it can soak into his skin.

Does anyone know of anything else I can do to cure this? I don’t have money right this second to get anti fungal shampoo (shoot me I live on a budget and don’t get paid for a few days)