Each ProDiet flavour has the same amount of protein to maintain the proper protein content to sustain your cat’s needs. This means that they help make up the immune system of your cats internal body structure. Fats are used to supply energy; fats make a diet more palatable to a cat and help to maintain a healthy skin and Haircoat. By extensive research, we have included Carbohydrates into your cat’s diet to help provide extra energy. Carbohydrates are typically made up primarily of sugars, starches and cellulose (fiber).