Well you feed like 1/4 the amount you do with any other kibble, because it is so rich in nutrients. Maybe the people don't know this and are feeding the same amount? I think you are thinking of the Innova EVO version that is the red meat one but I am talking of regular. Have you checked out their site on the ingredient list? The red meat one looks fine to me. Just be sure not to overfeed.
Meat-Based Pet Food – Premium Dog Food, Cat Food, Ferret Food, Dog Treats – EVO Pet Products Meat-Based Pet Food – Premium Dog Food, Cat Food, Ferret Food, Dog Treats – EVO Pet Products
By the way, don't quote me on the amount you are supposed to feed because that was just a guess.