I heard it in the RSPCA magazine. It says put it on a cats nose and tips of ears. A cat had to have her ears amputated, because cancerous tumours had grown there, because the cat had gotten sunburned on the tips of his ears.
I haven't read or heard anything thing about this... so this is just an opinion.....wouldn't that apply more for animals that spend ALOT of time in the sun? Wow... just never heard that from anyone... I guess we all learn something new everyday. I love my cats but they'd flip out if I put anything on their nose and ears and would instantly lick off whatever they could reach...so I won't be doing that any time soon.
I have heard of white or light colored dogs getting sunburned but never cats? How odd. I can't imagine trying to put sunblock of any kind on my cats. But honestly with them being indoor cats I would never really have to worry about it.