This is why I personally do not care for Science Diet. It is junk food. I have listed ingredients of four of their dog foods and what is wrong with them.
Natures Best Adult Beef
Brewers Rice, Ground Whole Grain Wheat, Chicken Meal, Corn Gluten Meal, Soybean Meal, Animal Fat , Beef, Peas, Carrots, Soybean Oil,
Adult Chicken and Rice
Chicken, Brewers Rice, Rice Flour, Ground Whole Grain Corn, Soybean Meal, Ground Whole Grain Sorghum, Chicken By-Product Meal, Animal Fat, Soybean Oil, Chicken Liver Flavor
Ground Whole Grain Corn, Chicken By-Product Meal, Soybean Meal, Animal Fat , Flaxseed, Chicken Liver Flavor, Dried Egg Product, Dried Carrots, Dried Spinach, Dried Grape Pomace
Large Breed Lamb and Rice
Lamb Meal, Brewers Rice, Rice Flour, Ground Whole Grain Wheat, Ground Whole Grain Sorghum, Corn Gluten Meal, Cracked Pearled Barley, Animal Fat , Chicken Liver Flavor, Soybean Oil
What is not good about most of these ingredients (from Natura Ingredient Tool);
Chicken By-Product Meal
Chicken byproduct meal consists of the dry, ground, rendered, clean parts of the carcass of slaughtered chicken, such as necks, feet, undeveloped eggs, and intestines
Corn Gluten Meal
Corn gluten meal is a low ash source of protein and acts as a urine acidifier in CAT FOODS. While not the best quality source of protein, the use of corn gluten in small amounts offer preventive health benefits for cats. In addition, unlike dogs, cats do not usually show signs of allergic reactions to corn products. Corn Gluten meal in dog food is cheap filler.
Animal fat is a byproduct of meat meal processing. The origin of the contributing animals is never known, and the resulting oil is very low in linoleic acid -- an essential fatty acid that is important for skin and coat health.
Brewer's rice is a lower quality rice product that is missing many of the nutrients found in ground rice and ground brown rice.
Soybean Oil and Soybean meal
Soybean oil is low among vegetable oils in linoleic acid. Soybean meal is poor quality protein filler. Many dogs are allergic to soybean products.
Sorghum is a member of the grass family; its leaves and stalk resemble corn but it does not have ears. Although sorghum is good source of carbohydrates, it is low in digestibility.
Whenever flour is part of an ingredient's name, the grain has been processed and some (or all) of the nutritional value has been lost. Frequently these flour ingredients are simply the leftover dust from processing human food ingredients.
Wheat and Corn
Very allergenic in dogs
I am listing 3 of the many top dog foods recommended so you can compare the first ten ingredients of Science Diet to the first ten ingredients of a decent super premium and decide why so many of us do not choose to feed Science Diet to our pets.
Chicken Meal, Turkey Meal, Brown Rice, White Rice, Lamb Meal, Chicken Fat, Herring Meal, Flax Seed, Sun Cured Alfalfa Meal, Sunflower Oil,
Turkey, Chicken, Chicken Meal, ground barley, Ground Brown Rice, Potatoes, Natural Flavors (quality chicken broth and a secret blend of herbs and spices), Ground White Rice, Chicken Fat, Herring
Chicken Soup for the Dog Lover’s Soul
Chicken, turkey, oatmeal, whole grain brown rice, chicken meal, turkey meal, whole grain white rice, chicken fat, potatoes, cracked pearled barley