You know, mine was eating Iams dry only--the hairball
formula.Maybe there is something abnormally drying about
it. But then, canned foods just ensure that cats get more
water. I am not sure that this helps with dandruff but something
sure helped my cat.

I began with Iams canned and it looked so unappetizing that I
then tried others. It was Fancy Feast, believe it or not, that he
liked the best. Happily, I read here that FF has recently
changed its formula and now has meat, fish, or poultry as a
first ingredient instead of byproducts, so it can be considered
a premium cat food.

The other thing about canned is that they just seem to look
forward to it more, though I cannot say I look forward to the
smell of the morning feeding, ugh! :)

Let us know what happens, if the canned helps or not. I
think this is a common problem in cats but more apparent in
black cats. Good luck!