My cat was exposed to a kitten who had a bald head. I was told it was probably due previously to fleas? The kitten was currently on advantage. He had come straight from a shelter. A few weeks later, my cats ears turned all red and scaly around the edges. I treated him with ear mite drops. Now he has a bald patch on his head, neck and I just noticed his tail. I thought maybe he was just scratching at his ears, but tail is strange. He's had fleas before, and never had that reaction, so I don't know if it could be fleas (I don't see any). His spots are grey, one looked red the other day, but now are just grey. I don't know of a vet open tomorrow either. What could be wrong?