Royal Canin Cat Food Question?

Royal Canin is junk just like Science Diet, Iams, Purina, and Meow Mix. It has a big name and is expensive so people think it's a better food. One dry food my cats always loved was Taste of the Wild. They can only have wet food now due to one of my cats having CRF but Taste of the Wild is about the highest quality dry food you can buy. My dog still eats it. Have you tried mixing the foods and gradually cutting out the cheap food? That might work for you. You really shouldn't feed her junk food.