When bubba was young my vet caught that he had ringworm right at the onset thankfully. I treated the few spots several times a day and I bathed him and my other dog with treatment to prevent the other dog from getting it. I also tried to keep them separated, I had no other animals at the time to worry about.

I did vacuum lots too since the spores can live for a long time. I also washed my hands all the time, we can get it too.