This person did not ask for advice on raw feeding, rather a recommendation on a dry food.Ha.... haha. Ok, now I get it.
If you want to be believe dogs are designed to digest corn, and that they ACTUALLY gain anything from eating it, then you go right on ahead believing. I don't need a peer reviewed studdy to tell my dog is a CARNIVORE, with the digestive tract of a CARNIVORE, designed to process meat, not corn or grains.
Dogs have survived thousands of years WITHOUT processed corn meals and glutens in their diets. The very fact that the corn absolutely MUST be cooked in order for them to gain anything at all from it, is proof enough of that. I don't see many wild dogs cooking their food, but maybe I'm missing out on something here.
I'll stick to raw, thanks, minus the corn. I suggest anyone else feeding their dog, kibble or otherwise, do the same.
So my advise to the original poster is find a food where a protein meal is the first ingredient and since you are asking about a dry food because a source of starch must be used to make it, one with corn or a combination of rice and corn. I like 30/20's because they can be used througout the life of the dog and have lower levels of total carbohydrate.
Your suggestions are 100% incorrect. Dogs are in fact designed to digest whatever is available. Whether its meat, bone, wild grains, fruit and vegetables.