This is a list of ingredients to stay away from... Why? Because theyre things that arent acceptable in HUMAN Grade... and if we don't accept them in our food, why would we accept them in the animal we loves food??
This is from FeedMyPet.com
1Meat by-products: Pet grade meat by-products consist of organs and parts either not desired, or condemned, for human consumption. This can include bones, blood, intestines, lungs, ligaments, heads, feet, and feathers.
2Corn Product: Corn products are difficult for dogs to digest.
3Food Fragments: Lower cost by-products of another food manufacturing process. Examples include wheat bran and brewer's rice (a waste product of the alcohol industry).
4Meat and bone meal: "Meat and bone meal" and "beef and bone meal" are inexpensive sources of animal protein. The protein in a meal containing a large amount of bone may be poorly digestible and fail to provide adequate nutrition.
5Animal Fat: Animal fat is a "generic" fat source that is most often made up of rendered animal fat, restaurant grease, or other oils too rancid or deemed inedible for humans. Look for a named fat source, such as poultry or chicken fat, that is naturally preserved.
6Chemical Preservatives: Chemical preservatives include butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), propyl gallate, propylene glycol (also used as a less-toxic version of automotive antifreeze), and ethoxyquin. BHA, BHT, and ethoxyquin are potentially cancer-causing agents. The long term build-up of these chemicals (that may be eaten every day for the life of your pet!) have not been thouroughly studied and may ultimately be harmful.
7Sweeteners: Sweeteners such as corn syrup, sugar, and cane mallases are usually added to lower quality foods to increase their appeal. Dietary sugars can aggrevate health problems, including diabetes.
8Beef Tallow: A low quality fat product.
Hope thats helpful