If your cat is a little on the chubby side, don't feed kitten food.
If you are looking for a decent but cheaper food, I would recommend Chicken Soup for the cat Lover's Soul... it uses brown rice rather than corn gluten meal for the filler and my cats loved it.
is a useful link and talks about the different premium dry foods and the pros and cons of them.
Chicken, Salmon, chicken meal, whole grain brown rice, chicken fat (preserved with mixed tocopherols), oatmeal, whole grain white rice, potatoes, cracked pearled barley, millet, turkey, duck, flaxseed, egg product, natural chicken flavor, carrots, peas, apples, dried skim milk, kelp, cranberry powder, rosemary extract, parsley flake, salt, choline chloride, dried chicory root, methionine, potassium chloride, taurine, zinc sulfate, vitamin E supplement, niacin, manganese sulfate, copper sulfate, thiamine mononitrate, vitamin A supplement, biotin, potassium iodide, calcium pantothenate, riboflavin, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, manganous oxide, sodium selenite, vitamin D supplement, folic acid.
Crude Protein 30% minimum
Crude Fat 20% minimum
Crude Fiber 3% maximum
Moisture 10% maximum
Magnesium 0.1% maximum
Taurine 0.1% minimum
Omega-6 Fatty Acids* 3.4% minimum
Omega-3 Fatty Acids* 0.6% minimum
*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profile.
3,922 kcals/kg (367 kcals/cup) Metabolizable Energy