Our blind cat has developed an odd rash on his back just above his tail. I say rash - I think it's a rash, but I'm not sure. I've never seen anything like it before. I've made a vet's appointment for next week, but just wondering if anyone can reassure me that's it not serious or even tell me what it might be? It doesn't seem to be bothering him - I only noticed it because it felt rough when you stroke him. He doesn't seem to be scratching it, and it doesn't seem to be causing him any discomfort. He has spot on treatment for fleas every month, but I've checked anyway for fleas and didn't see any. And when I used a flea comb, I found the dried rashy skin basically combed out. It's pretty much all gone now, and his skin feels much better. But I'm still worried. I've attached some photos of it on his skin, and then once it combed out. It definitely looks like some sort of rash to me, but does anyone have any ideas?