It could be more because of the grains, which are pretty much 'fillers'. Here is the ingredients in the Salmon formulas from Instinct to Prarie formula. Rice, Oats, Barely are the 3 ingredients following the Salmon Meal in prairie, which means those are the most ingredients in the food next to Salmon Meal.
Instinct formula:
Salmon Meal, Herring Meal, Menhaden Fish Meal, Canola Oil, Tapioca, Pea Starch, Pork Liver, Natural Pork Flavor, Coconut Oil, Sun-Cured Alfalfa Meal, Tomato Pomace, Montmorillonite Clay, Vitamins (Choline Chloride, Vitamin E Supplement, Ascorbic Acid, Biotin, Niacin Supplement, Vitamin A Acetate, d-Calcium Pantothenate, Riboflavin Supplement, Pyridoxine Hydrochloride, Thiamine Mononitrate, Vitamin B12 Supplement, Carotene, Vitamin D3 Supplement, Folic Acid), Potassium Chloride, Minerals (Zinc Proteinate, Iron Proteinate, Manganese Proteinate, Copper Proteinate, Sodium Selenite, Ethylenediamine Dihydriodide), Sea Salt, Dried Kelp, Direct-Fed Microorganisms (Saccharomyces Cerevisiae Yeast Culture, Dried Enterococcus Faecium Fermentation Product, Dried Lactobacillus Acidophilus Fermentation Product, Dried Aspergillus Niger Fermentation Extract, Dried Trichoderma Longibrachiatum Fermentation Extract, Dried Bacillus Subtilis Fermentation Extract), Taurine, Carrots, Garlic, Apples, Pumpkin, Mixed Tocopherols with Citric Acid (a natural preservative), Rosemary Extract, Freeze Dried Cod.
Prairie formula:
Salmon Meal, Brown Rice, Oatmeal, Barley, Canola Oil, Pumpkinseeds, Ground Flaxseeds, Montmorillonite Clay, Natural Chicken Flavor, Potassium Chloride, Vitamins (Choline Chloride, Vitamin E Supplement, Ascorbic Acid, Biotin, Niacin Supplement, Vitamin A Acetate, d-Calcium Pantothenate, Riboflavin Supplement, Pyridoxine Hydrochloride, Thiamine Mononitrate, Vitamin B12 Supplement, Carotene, Vitamin D3 Supplement, Folic Acid), Sea Salt, Minerals (Zinc Proteinate, Iron Proteinate, Manganese Proteinate, Copper Proteinate, Sodium Selenite, Ethylenediamine Dihydriodide), Direct-Fed Microorganisms (Saccharomyces Cerevisiae Yeast Culture, Dried Enterococcus Faecium Fermentation Product, Dried Lactobacillus Acidophilus Fermentation Product, Dried Aspergillus Niger Fermentation Extract, Dried Trichoderma Longibrachiatum Fermentation Extract, Dried Bacillus Subtilis Fermentation Extract), Inulin, Flaxseed Oil, Apples, Carrots, Peas, Chicken Eggs, Cottage Cheese, Mixed Tocopherols with Citric Acid (a natural preservative), Rosemary Extract, Freeze Dried Chicken, Freeze Dried Turkey, Freeze Dried Turkey Liver, Freeze Dried Turkey Heart, Ground Chicken Bone, Butternut Squash, Broccoli, Lettuce, Spinach, Dried Kelp, Salmon Oil, Apple Cider Vinegar, Parsley, Honey, Blueberries, Alfalfa Sprouts, Persimmons, Olive Oil, Duck Eggs, Pheasant Eggs, Quail Eggs, Rosemary, Sage, Clove.