I agree with you that Authority is just as good as Science Diet and Iams, but there are a lot of people on here that question the quality of Science Diet and Iams...including myself.
Super premuium, all natural pet foods have lists of indredients of whole, natural foods. There is much more of a chance that a cat is allergic to something strange in a commercial brand food (such as Science diet, Authority or Iams) than in an all natural food that takes its protien and carbohydrate percentage from only a few sources.
Notice the difference:
Natural California Natural Chicken and Rice dry:
Chicken, Chicken Meal, Ground Brown Rice, Chicken Fat, Sunflower Oil, Flaxseed, Vitamins and Minerals.
Iams Original Formula dry:
Chicken, Chicken By-Product Meal, Corn Grits, Ground Whole Grain Sorghum, Corn Meal, Chicken Fat (preserved with Mixed Tocopherols, a source of vitamin E, and Citric Acid), Fish Meal (source of fish oil), Dried Beet Pulp (sugar removed), Dried Egg Product, Natural Chicken Flavor, Potassium Chloride, Brewers Dried Yeast, DL-Methionine, Choline Chloride, Salt, Calcium Carbonate, Vitamin E Supplement, Zinc Oxide, Manganese Sulfate, Niacin, Ascorbic Acid, Vitamin A Acetate, Copper Sulfate, Calcium Pantothenate, Biotin, Rosemary Extract, Thiamine Mononitrate (source of vitamin B1), Pyridoxine Hydrochloride (source of vitamin B6), Vitamin B12 Supplement, Riboflavin Supplement (source of vitamin B2), Vitamin D3 Supplement, Inositol, Folic Acid, Potassium Iodide, Cobalt Carbonate.
Science Diet Chicken and Rice dry:
Chicken, brewers rice, corn gluten meal, chicken by-product meal, corn meal, animal fat (preserved with mixed tocopherols and citric acid), chicken liver flavor, DL- methionine, taurine, preserved with mixed tocopherols and citric acid, minerals (potassium chloride, calcium sulfate, salt, ferrous sulfate, zinc oxide, copper sulfate, manganous oxide, calcium iodate, sodium selenite), rosemary extract, beta carotene, vitamins (choline chloride, vitamin A supplement, vitamin D3 supplement, vitamin E supplement, L-ascorbyl-2-polyphosphate (a source of vitamin C), niacin, thiamine mononitrate, calcium pantothenate, riboflavin, pyridoxine hydrochloride, folic acid, biotin, vitamin B12 supplement
I don't have the listing for the Authority cat food, but I would really start comparing
that actual ingredients of what your car is eating. Things like "corn gluten meal" and "by-products" and "corn meal" and
corn grits" are things that you don't want to see. Here are some other recommendations too. I have used dry food to do the comparison, but the ingredients are very similiar to wet.
Innova dry cat food:
Turkey, Chicken Meal, Chicken, Potatoes, Egg, Ground Barley, Chicken Fat, Rice, Herring, Sunflower Oil, Apples, Carrots, Whole Pasteurized Milk, Fish Oil, Garlic, Alfalfa Sprouts.
Chicken Soup for the Cat Lovers Soul:
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.