★★★★★
I volunteer for Animal Services and foster cats and kittens. What we use for ringworm is sulfurated lime rinses. It's not popular with the cats, and it smells like sulfur (rotten eggs), and has to be done fairly often for a substantial amount of time but it apparently works. I haven't used it, but other volunteer fosters have used it. One brand name is Derma Pet. Hope this helps.
