I noticed yesterday that my orange boy, Leo, has a lot more black whiskers than he used to. More black freckles on his nose, too. Maybe the new black whiskers are growing out of black freckles in his muzzle (or whatever you call the whiskery part of a cat's face). It's strange to see so many black whiskers on an orange-&-white face. I'll try to get a photo of Leo's face...if he'll sit still long enough!
I read a brief reference to black "age" spots this morning (in Dewey), but surely that's not what those freckles are. Leo's only about 4.5 years old.