Space precludes our listing every ingredient in every food, but this is unnecessary. The items that are 10 or so ingredients down the list are far less meaningful to the overall food quality that the first few ingredients. The exception to this rule is the presence, no matter how small, of chemical preservatives, color, and flavors. We don't think they should be present in dog foods at all. And because the labels don't have to list the relative percentages of each ingredient, it's impossible to know how much more corn than beef there may be.
Allergies are an individual thing.
True, there are more dogs that are allergic to wheat and corn than any other ingredients. But the vast majority of dogs can eat wheat and corn without problems. Finally, remember that we have not seen every dog food on the market. New foods emerge on a monthly basis, some are available on a regional scale only. We've tried to list foods that are good examples of the kinds of foods you should be looking for.