Compare ingredient differences and practical choice guidance. Replace A or B to explore another candidate.
A · Food to compare
Hill's
B · Food to compare
Hill's
Compared using current public information
This pair includes a special-purpose diet. Check its intended purpose and your veterinarian’s feeding instructions before treating it as a replacement for an everyday food.
These are existing public-review checks under general reference criteria, not an assessment of your dog’s health or growth requirements.
Hill's i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Special-purpose diet — follow veterinary direction · Daily food · Adult · Kibble (Extruded)
Hill's Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Special-purpose diet — follow veterinary direction · Daily food · Adult · Kibble (Extruded)
If the intended use matches, compare the ingredients below with foods your dog has previously eaten well.
Hill's i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Named animal protein in the first five entries: Chicken Meal (#3). Clearly identified animal protein sources are a strength of this label. Chicken Meal (#3): rendered and ground meals, concentrated sources of protein. A species-named meal is not automatically inferior to fresh meat. Chicken By-Product Meal (#4): ingredients from parts other than muscle meat. They can supply nutrients; the drawback of a broad by-product label is less detail about the tissues used, not proof of poor nutrition. Chicken Fat (#7): fat/oil sources. An animal name in a fat ingredient does not make it an additional meat-protein source.
Hill's Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Named animal protein in the first five entries: Chicken (#1). Clearly identified animal protein sources are a strength of this label. Chicken (#1): meat/fish ingredients. Fresh meat is weighed with its water; first place does not mean it supplies more protein than a dried ingredient. Chicken Fat (#9), Soybean Oil (#15), Fish Oil (#16): fat/oil sources. An animal name in a fat ingredient does not make it an additional meat-protein source.
The differing animal protein sources are: A: Chicken Meal, Chicken By-Product Meal / B: Chicken. Check the named sources and forms against ingredients you need to avoid; shared names do not establish quantities or digestibility.
Hill's i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Corn Protein Meal (#2): separated or concentrated plant protein that contributes to the declared crude protein. This is a different ingredient role from whole grains or pulses. Plant protein sources account for 1 of the first five entries. This matters if you want animal-protein-focused food: a high crude-protein percentage is not a meat-content percentage.
Hill's Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Corn Protein Meal (#4): separated or concentrated plant protein that contributes to the declared crude protein. This is a different ingredient role from whole grains or pulses. Plant protein sources account for 1 of the first five entries. This matters if you want animal-protein-focused food: a high crude-protein percentage is not a meat-content percentage.
Therapeutic diets may select protein sources for allergy or disease management. Follow the prescribed feeding purpose rather than replacing a diet solely because it contains plant protein.
Hill's i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Brewers Rice (#1): primarily carbohydrate energy sources, also contributing the protein and fiber naturally present in the ingredient. Dried Beet Pulp (#13): supplies dietary fiber, contributing to the food’s fiber composition rather than supplementing protein.
Hill's Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Cracked Pearled Barley (#2), Brewers Rice (#3), Whole Grain Corn (#5), Whole Grain Oats (#6): primarily carbohydrate energy sources, also contributing the protein and fiber naturally present in the ingredient. Powdered Cellulose (#10), Dried Beet Pulp (#12), Psyllium Seed Husk (#28): supplies dietary fiber, contributing to the food’s fiber composition rather than supplementing protein.
Both list Brewers Rice as carbohydrate energy sources. The differing carbohydrate energy sources are: B: Cracked Pearled Barley, Whole Grain Corn, Whole Grain Oats. Both list Dried Beet Pulp as dietary fiber sources. The differing dietary fiber sources are: B: Powdered Cellulose, Psyllium Seed Husk. The choice is whether to retain a familiar carbohydrate source or avoid a particular ingredient.
Some panels lack verified complete coverage. We do not claim an ingredient is absent or the recipes are identical for those products.
A · Hill's
Commentary reviewed 2026-09-22
B · Hill's
Commentary reviewed 2026-09-22
A · Hill's i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Follow veterinary feeding instructions rather than a general calculator.
B · Hill's Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Follow veterinary feeding instructions rather than a general calculator.
Affiliate links are disclosed in the purchase options. Commissions do not determine this comparison’s order or interpretation.
Scores and nutrients are reference information. Meaningful differences in intended use and ingredients matter more than small numerical gaps.
Key nutrient comparison
Compare protein, fat, fiber, ash, moisture, phosphorus, sodium, and calories in the same modal. Undisclosed values are shown as empty bars.
i/d Low Fat Dry Dog Food | Hill's Prescription Diet
Gastrointestinal Biome Dry Dog Food | Hill's Prescription Diet
Protein
26.1 %
21.0 %
Fat
7.50 %
12.6 %
Fiber
Undisclosed
Undisclosed
Ash
Undisclosed
Undisclosed
Moisture
10.0 %
10.0 %
Phosphorus
0.64 %
0.67 %
Sodium
0.45 %
0.39 %
Calories
3311 kcal/kg
3327 kcal/kg
Score basis comparison
Sources for interpreting ingredients
AAFCO · Ingredient definitionsTufts · Ingredient weight and nutritionAAFCO · Corn protein ingredient definitionLabel analysis 1/5 · 3311 kcal/kg
Brewers Rice, Corn Protein Meal, Chicken Meal, Chicken By-Product Meal, Hydrolyzed Chicken Flavor, Flaxseed, Chicken Fat, Ground Pecan Shells, Pork Liver Flavor, Lactic Acid, Fish Flavor, Ginger, Dried Beet Pulp, Iodized Salt, Potassium Citrate, Dried Citrus Pulp, Potassium Chloride, Choline Chloride, Calcium Sulfate, Dicalcium Phosphate, Glyceryl Monostearate, vitamins (Vitamin E Supplement, Thiamine Mononitrate, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Calcium Pantothenate, Vitamin A Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Vitamin B12 Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), Pressed Cranberries, L-Lysine, Taurine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Magnesium Oxide, Mixed Tocopherols for freshness, Natural Flavors, L-Carnitine, Beta-Carotene.
ingredients-1427 · db_list:fb9a687d
Label analysis 2.5/5 · 3327 kcal/kg
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 (source of Vitamin C), 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.
ingredients-1452 · db_list:333ad95a