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Hill's Prescription Diet z/d Original Skin/Food Sensitivities Dry Dog Food is hot extruded (which means it's processed under extreme heat and pressure) and made with feed grade ingredients, which are unfit for human consumption. It contains 25 synthetic additives (so it is not all-natural), it has 1 anti-nutrient, Soybean Oil (which may interfere with the absorption of essential nutrients), and it has 3 other sketchy ingredients, including Powdered Cellulose and Natural Flavors.

Warning Due to this being a grain-free food that contains legumes or potatoes this Hill's Prescription Diet recipe may be implicated in the FDA's ongoing investigation into diet-related Dilated Cardiomyopathy (or DCM), a potentially fatal heart condition.

Read our article about Grain Free Foods And Heart Failure
Hill's Prescription Diet
  • Air-Dried
  • Human Grade
  • All-Natural
  • No Anti-Nutrients
  • No Sketchy Ingredients
  • Hot Extruded Kibble
  • Feed Grade
  • 25 Synthetics
  • 1 Anti-Nutrient
  • 3 Sketchy Ingredients
Detailed Comparison
Sundays Air-Dried Food for Dogs Human Grade Beef Recipe Hill's Prescription Diet z/d Original Skin/Food Sensitivities Dry Dog Food
Family-owned Owned by Colgate-Palmolive
Human Grade Feed Grade
Air-Dried Hot Extruded Under Extreme Heat And Pressure
No Anti-Nutrients
1 Anti-Nutrient:
Soybean oil
All-Natural
25 Synthetics:
Calcium carbonate, Dicalcium phosphate, Lactic acid, Potassium chloride, Glyceryl monostearate, Choline chloride, Vitamins (vitamin e supplement, L-ascorbyl-2-polyphosphate (source of vitamin c), Niacin supplement, Thiamine mononitrate, Vitamin a supplement, Calcium pantothenate, Vitamin b12 supplement, Pyridoxine hydrochloride, Riboflavin supplement, Folic acid, Vitamin d3 supplement), Dl-methionine, Minerals (ferrous sulfate, Zinc oxide, Copper sulfate, Manganous oxide, Calcium iodate, Sodium selenite), Taurine
Nothing sketchy
3 Other Sketchy Ingredients:
Corn starch, Powdered cellulose, Natural flavors
Ingredients:
USDA Beef, Beef Liver, Beef Bone, Pumpkin, Millet, Wild Salmon Oil, Sunflower Oil, Kale, Flaxseed, Zucchini, Sea Salt, Parsely, Kelp, Chicory Root, Turmeric, Mixed Tocopherols, Ginger, Selenium Yeast, Blueberries, Carrots, Apples, Tomatoes, Shiitake Mushrooms, Broccoli, Oranges, Cranberries, Spinach, Beets, Tart Cherries, Strawberries
Ingredients:
Corn Starch, Hydrolyzed Chicken Liver, Powdered Cellulose, Soybean Oil, Calcium Carbonate, Dicalcium Phosphate, Lactic Acid, Potassium Chloride, Glyceryl Monostearate, Choline Chloride, Iodized Salt, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Folic Acid, Vitamin D3 Supplement), DL-Methionine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.
* Please note that while we work to keep this information as up-to-date as possible, specific recipes and formulations may have changed since the time that the Comparison Tool was created.