I have a foster cat that I took in for our shelter last week, and she has developed a grayish spot/mark on her nose. She was a stray for some time, then was staying with another woman who helps with our shelter. She didn't have it right when I got her, but it emerged within a day or so. I'm hoping it's not ringworm... she is separated from my others just in case. I don't need them sick yet! Sorry for the large sized pics, I just wanted her nose clearly visable.