My Sheldon had more dander flakes on him than the other cats. The vet asked me if he's a "good groomer." I never really noticed until she asked that - but he doesn't groom himself as much or as often as the other cats. I started using the Furminator on him daily, and he looks great!
If it's dandruff, you can give him 500mg of Evening Primrose oil daily to help his skin and coat.
Most cats don't object to the taste of evening primrose oil - just puncture the capsule and squeeze it onto her meal. Oh - wait, I don't know if what you feed is dry or wet? If dry, maybe give her a meal of wet food a day. This would help her overall health too. :nod: