Hill's Prescription Diet Gastrointestinal Biome (Adult, Dry)
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Ingredients (verbatim, per manufacturer product page): Chicken, Cracked Pearled Barley, Brewers Rice, Corn Protein Meal, Whole Grain Corn, Whole Grain Oats, Ground Pecan Shells, Chicken Liver Flavor, Chicken Fat, Powdered Cellulose, Flaxseed, Dried Beet Pulp, Pork Liver Flavor, Dried Citrus Pulp, Soybean Oil, Fish Oil, Calcium Carbonate, Dicalcium Phosphate, Lactic Acid, Potassium Chloride, Pumpkin, Pressed Cranberries, L-Lysine, Iodized Salt, Choline Chloride, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate, Thiamine Mononitrate, Niacin Supplement, Calcium Pantothenate, Vitamin A Supplement, Riboflavin Supplement, Pyridoxine Hydrochloride, Vitamin B12 Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), Ginger, Psyllium Seed Husk, L-Threonine, Taurine, L-Tryptophan, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.
Guaranteed analysis (dry-matter basis, per manufacturer): Crude Protein 21.0%, Crude Fat 12.6%, Crude Fiber 7.4%. Hill's publishes this recipe's nutrient content on a dry-matter basis rather than an as-fed guaranteed-analysis panel, and moisture is not separately published, so it is left blank here rather than estimated. Energy 3327 kcal/kg calculated metabolizable energy (330 kcal/cup). AAFCO: Animal feeding tests using AAFCO procedures substantiate that Hill's Prescription Diet Gastrointestinal Biome Dog Food provides complete and balanced nutrition for maintenance of adult dogs. Chicken is the first ingredient.
Hill's sells Gastrointestinal Biome as part of its Prescription Diet line, a therapeutic tier available through veterinarians rather than on the open shelf. Hill's describes it as "formulated with ActivBiome+, a proprietary blend of prebiotic fibers, to help support digestive health." It is a dry kibble formulated for adult dogs, and the first five ingredients on the label are Chicken, Cracked Pearled Barley, Brewers Rice, Corn Protein Meal, and Whole Grain Corn. Hill's lists ingredients by pre-cooking weight, so the order shows what goes into the recipe before processing, not the finished proportions. It comes in 27.5 lb, 16 lb, 8 lb, 4.5 lb. Hill's product page states: "Ask your veterinarian for specific feeding instructions for your pet." Sniff and Shift makes single ingredient freeze dried treats, which are treats rather than meals, and they pair with any complete diet on this list. Ask your veterinarian before feeding any therapeutic diet.
Consolidated from publicly available manufacturer information (link above), compiled Sep 20, 2026. Not tested or evaluated by Sniff and Shift. Not medical advice, verify on current packaging and consult your veterinarian.
Questions about Hill's Prescription Diet Gastrointestinal Biome
What are the first ingredients in Hill's Prescription Diet Gastrointestinal Biome?
As listed on Hill's Prescription Diet's product page, the first ingredients are Chicken, Cracked Pearled Barley, Brewers Rice, Corn Protein Meal, Whole Grain Corn. The full list is on the spec sheet above.
How much protein and fat does Hill's Prescription Diet Gastrointestinal Biome have?
Hill's Prescription Diet publishes crude protein 21.0% (dry-matter basis) and crude fat 12.6% (dry-matter basis), with 3327 kcal/kg (330 kcal/cup). These are the maker's published figures, not our measurements.
Does Hill's Prescription Diet publish an AAFCO statement for Hill's Prescription Diet Gastrointestinal Biome?
Hill's Prescription Diet states: Animal feeding tests using AAFCO procedures substantiate that Hill's Prescription Diet Gastrointestinal Biome Dog Food provides complete and balanced nutrition for maintenance of adult dogs. (per manufacturer)
What kind of food is Hill's Prescription Diet Gastrointestinal Biome?
Hill's Prescription Diet lists it as dry kibble, adult dog food.
Where do these numbers come from?
Every figure on this page is transcribed from Hill's Prescription Diet's own product page, linked in the Source line above. Check the bag for the current label.
Source: Hill's Prescription Diet product page (hillspet.com). Figures are the maker's published values; check the bag for the current label.
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