I never even thought of his color change as a health issue. I'll call the vet tomorrow, thanks for bringing it to my attention. It is fun watching him turn gray, the second picture shows his back and his fur looks little brownish. In "real life" the gray is a light color, almost white. Strange huh?

I guess he want's to look more like our Storm instead of Tubby, Casper or Pepper. Silly kitty!