Rayona: I'm glad the shampoo worked for you, sometimes that's all you need, or some times just the oil suppliments work wonders, and others with sever cases have to use both.
I think the rubber brushes are great, they work so quickly and efficantly when it comes to removing shedding hair from the cat, and well just about any other surface too!
Padunk: A lot of the hypo-allergenic foods actually cost a bit less then Wellness does. On average depending on where you buy it, Wellness is one of the most expensive non perscription foods on the market.
Foods such as what Dr. Jean listed, and others (including ones like Solid Gold) are safe to feed just like you would any other diet, of course pending any allergic reactions to anything in the new food. With the food, and the oil suppliments, it can help her skin and coat from the inside out.
Both cats could eat these foods, they are good quality, and for all life stages. With the wet food, you'll be starting off slow, to get her used to it and hope she'll accept it! Feed a little of it with her dry food for about two weeks or so, see if you notice any difference in her skin, then you can continue to increase the wet/dry food ratio as you begin to achieve the desired change.