I was about to ask you all a question, "How to photograph a cat with a lot of gray in the hair?" I don't have an external flash, so I have to go off natural light, but photos of my cat Maybel always make her fur sparkle like a Twilight vampire and the image never looks right. Archibald, however, is really photogenic. I don't feel like I do anything different, but maybe that's the problem.
I did this recently though, it's one of the first that doesn't make her fur sparkle, but I don't remember what/if I did differently. I still haven't quite got an image that shows off her personality well yet.