When I was 21, I came back from the lake with what we call 'ringworm'. It is not a worm but a fungus. An older man I showed it to told me to put iodine on it. The red skin cleared within a few days. Ever since, I have been using it on abandoned cats that come in from the cold with various states of the fungus. It clears within days. Vets panic at the sight of ringworm because of the possibility of contagion to humans. Some will even suggest to put the animal to sleep. They have a tendancy to give chemical pills, I have no idea if they work. Apply the iodine on the rim of the spot as it is where the fungus lies and multiplies.
Lost and Found Pet Network