You have to view the website “longliveyourdog.com” which is rather a sad state of affairs as the pet products will more likely than not not let your dog live a full life considering how nutritional deficient many of the products are. Marketing is one hell of a tool!
Purina Dog Chow is not very good and it is very close to the other product called Purina Beneful which is also something you would not want to feed your dog. Corn much like Beneful is the top ingredient again and lets face it there is simply not much nutritional value in corn as the bulk ingredient in a dog food product.
It is cheap for this reason alone. Next on their list is chicken by-products which is left over chicken after the slaughter such as chicken innards and the like. The protein balance is not the same when you compareto chicken by-products meal. More corn and wheat has been added and meat and bone meal. Note that chicken by-products means that they have to exclude chicken feet and chicken feathers in the mixture.
Nothing other than it is cheap.
Ingredients: Ground yellow corn, chicken by-product meal, corn gluten meal, whole wheat flour, animal fat preserved with mixed-tocopherols (form of Vitamin E), rice flour, beef, soy flour, sugar, sorbitol, tricalcium phosphate, water, salt, phosphoric acid, animal digest, potassium chloride, dicalcium phosphate, sorbic acid (a preservative), L-Lysine monohydrochloride, dried peas, dried carrots, calcium carbonate, calcium propionate (a preservative), choline chloride, added color (Yellow 5, Red 40, Yellow 6, Blue 2), DL-Methionine, Vitamin E supplement, zinc sulfate, ferrous sulfate, Vitamin A supplement, manganese sulfate, niacin, Vitamin B-12 supplement, calcium pantothenate, riboflavin supplement, copper sulfate, biotin, garlic oil, thiamine hydrochloride, pyridoxine hydrochloride, thiamine mononitrate, folic acid, Vitamin D-3 supplement, menadione sodium bisulfite complex (source of Vitamin K activity), calcium iodate, sodium selenite.