There are a few things that come to mind when I hear/see kitty skin issues. Sometimes, dry
flaky skin can be a sign of diabetes, kidney disease,
and thyroid disease. If it were one of those 3 conditions, you would most definitely see other signs as well. If you're pretty sure that kitty doesn't have any other symptoms, then maybe it's just plain old dry skin. There are additives that can be put into a kitty's food that can help with that-salmon oil (I think).
Take care!!