Hill's i/d Chicken Flavor Dog Food | Hill's Prescription Diet vs Royal Canin Canine Gastrointestinal | Dog food comparison

Compare ingredient differences and practical choice guidance. Replace A or B to explore another candidate.

A · Food to compare

Hill's

i/d Chicken Flavor Dog Food | Hill's Prescription Diet

B · Food to compare

Royal Canin

Canine Gastrointestinal

Compared using current public information

What matters for this choice

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.

Who is it made for?

Hill's i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Special-purpose diet — follow veterinary direction · Daily food · Adult · Kibble (Extruded)

Royal Canin Canine Gastrointestinal

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.

Animal protein: sources and forms

Hill's i/d Chicken Flavor 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 Meal (#8): rendered and ground meals, concentrated sources of protein. A species-named meal is not automatically inferior to fresh meat. Egg Product (#9): eggs are another animal protein source, distinct from meat. Chicken Fat (#7), Fish Oil (#21): fat/oil sources. An animal name in a fat ingredient does not make it an additional meat-protein source.

Royal Canin Canine Gastrointestinal

Named animal protein in the first five entries: Meat Meal (Chicken, Duck) (#3), Animal-Derived Protein (Chicken, Turkey) (#5). Clearly identified animal protein sources are a strength of this label. Meat Meal (Chicken, Duck) (#3): rendered and ground meals, concentrated sources of protein. A species-named meal is not automatically inferior to fresh meat. Animal-Derived Protein (Chicken, Turkey) (#5): supplies protein from the named animals in parentheses. The sources are disclosed, but grouping them hides their individual inclusion amounts and positions. Animal Fat (Chicken, Duck) (#8), Fish Oil (#11): 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, Chicken Meal, Egg Product / B: Meat Meal (Chicken, Duck), Animal-Derived Protein (Chicken, Turkey). Check the named sources and forms against ingredients you need to avoid; shared names do not establish quantities or digestibility.

Is protein supplemented with plant ingredients?

Hill's i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Corn Protein Meal (#6): separated or concentrated plant protein that contributes to the declared crude protein. This is a different ingredient role from whole grains or pulses. If you want to avoid added plant protein, this food does not meet that preference.

Royal Canin Canine Gastrointestinal

No processed plant protein source is identified in the available panel. Unverified panel coverage cannot establish that these ingredients are absent. Rice, Corn, Barley also contribute naturally occurring plant protein, so the declared crude protein is not all animal protein.

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.

What supplies carbohydrates and fiber?

Hill's i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Cracked Pearled Barley (#2), Brown Rice (#3), Brewers Rice (#4), Whole Grain Corn (#5): primarily carbohydrate energy sources, also contributing the protein and fiber naturally present in the ingredient. Dried Beet Pulp (#16): supplies dietary fiber, contributing to the food’s fiber composition rather than supplementing protein.

Royal Canin Canine Gastrointestinal

Rice (#1), Corn (#2), Barley (#4): primarily carbohydrate energy sources, also contributing the protein and fiber naturally present in the ingredient. Psyllium Fiber (#10): supplies dietary fiber, contributing to the food’s fiber composition rather than supplementing protein.

The differing carbohydrate energy sources are: A: Cracked Pearled Barley, Brown Rice, Brewers Rice, Whole Grain Corn / B: Rice, Corn, Barley. The differing dietary fiber sources are: A: Dried Beet Pulp / B: Psyllium Fiber. 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.

The editor’s ingredient insights

A · Hill's

i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Hill’s i/d Chicken lists chicken first, but barley, brown rice, brewers rice, corn, and corn protein quickly follow, so I read it as a digestive prescription design rather than a meat-density food. With beet pulp, citrus pulp, flaxseed, and liver flavors, I would use it under veterinary direction for dogs with unstable stool or recovery needs, not as a general ingredient-upgrade pick.

Commentary reviewed 2026-09-22

B · Royal Canin

Canine Gastrointestinal

Royal Canin Gastrointestinal starts with rice, corn, and chicken/duck meal, then adds barley, poultry digest/protein, beet pulp, psyllium, fish oil, and fructooligosaccharides. It is worth considering when a veterinarian has directed GI feeding and the goal is lower fat burden and stool stability, not ingredient prestige. It discloses 22% protein, 7% fat, 1.7% fiber, 3,470 kcal/kg, 1.1%/0.8% calcium/phosphorus, 0.5% sodium, and 0.14% EPA/DHA. I would not choose it as a meat-forward upgrade for healthy dogs or for grain, corn, or poultry avoidance.

Commentary reviewed 2026-09-22

Your next step

A · Hill's i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Product details

Follow veterinary feeding instructions rather than a general calculator.

B · Royal Canin Canine Gastrointestinal

Product details

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.

Reference: analysis scores, nutrients and ingredient evidence

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.

Hill's

Royal Canin

Protein
26.2 %
22.0 %
Fat
13.6 %
7.00 %
Fiber
Undisclosed
1.70 %
Ash
Undisclosed
Undisclosed
Moisture
10.0 %
Undisclosed
Phosphorus
0.60 %
0.80 %
Sodium
0.38 %
0.50 %
Calories
3589 kcal/kg
3470 kcal/kg

Score basis comparison

Reads the top ingredient structure and animal-forward build.

Hill's

Royal Canin

Scores summarize public data under a fixed method. Read the ingredient panels and intended use to understand similarity and suitability.

Hill's

Top ingredients: Chicken, Cracked Pearled Barley, Brown Rice
Strength: Prescription purpose: gastrointestinal care
Watchout: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.

Royal Canin

Top ingredients are limited
Strength: Prescription purpose: gastrointestinal care
Watchout: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.

Reads how much guaranteed and extra nutrient data is disclosed.

Hill's

79.1

Royal Canin

99.4

Scores summarize public data under a fixed method. Read the ingredient panels and intended use to understand similarity and suitability.

Hill's

79.1

Data grade: PARTIAL
9 disclosed nutrient items · Protein, Fat, moisture
Conservative point: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.

Royal Canin

99.4

Data grade: PARTIAL
15 disclosed nutrient items · Protein, Fat, Dietary Fiber
Conservative point: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.

Reads whether core nutrient caution checks like Ca:P balance and calcium/phosphorus ceilings are disclosed clearly and pass.

Hill's

Royal Canin

Scores summarize public data under a fixed method. Read the ingredient panels and intended use to understand similarity and suitability.

Hill's

0 warnings / 0 fails / 4 undisclosed
Watchout: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.
Ca:P and calcium/phosphorus ceiling disclosure reads relatively clearly.

Royal Canin

0 warnings / 0 fails / 1 undisclosed
Watchout: Prescription diets should be compared by clinical purpose and veterinary direction before standard ingredient ranking.
Ca:P and calcium/phosphorus ceiling disclosure reads relatively clearly.

Hill's

This brand has a confirmed recall history. The most recent public recall noted here was the 2019 vitamin D incident.
A past recall does not automatically disqualify the current recipe, but recency, cause, and follow-up response still matter.
Scope checked: FDA · AVMA · PetRecalls · PawDiet · Dogster · manufacturer sites

Royal Canin

This brand has a confirmed public recall history, with a recent 2023 mislabeling case in public sources.
Mislabeling or multi-line recalls are best read as part of operations and quality-control context, not just the recipe itself.
Scope checked: FDA · AVMA · PetRecalls · PawDiet · Dogster · manufacturer sites

Sources for interpreting ingredients

AAFCO · Ingredient definitions Tufts · Ingredient weight and nutrition AAFCO · Corn protein ingredient definition

A · i/d Chicken Flavor Dog Food | Hill's Prescription Diet

Label analysis 2.5/5 · 3589 kcal/kg

Chicken, Cracked Pearled Barley, Brown Rice, Brewers Rice, Whole Grain Corn, Corn Protein Meal, Chicken Fat, Chicken Meal, Egg Product, Chicken Liver Flavor, Pork Liver Flavor, Ground Pecan Shells, Lactic Acid, Potassium Chloride, Flaxseed, Dried Beet Pulp, Calcium Carbonate, Dried Citrus Pulp, L-Lysine, Choline Chloride, Fish Oil, Iodized Salt, Pressed Cranberries, L-Threonine, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Calcium Pantothenate, Vitamin A Supplement, Pyridoxine Hydrochloride, Biotin, Riboflavin Supplement, Vitamin B12 Supplement, Folic Acid, Vitamin D3 Supplement), L-Tryptophan, Taurine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), DL-Methionine, Mixed Tocopherols for freshness, Natural Flavors, Magnesium Oxide, Beta-Carotene.

ingredients-1479 · db_list:2d5b2c5f

B · Canine Gastrointestinal

Label analysis 1/5 · 3470 kcal/kg

쌀, 옥수수, 육분(닭,오리), 보리, 동물성 유도단백질(닭,칠면조), 사탕무박, 혼합광물질류 합제, 동물성 지방(닭,오리), 글리세린 지방산 에스테르, 차전자피식이섬유, 어유, 프락토올리고당, 호모(만난올리고당의 원료), DL-메치오닌, 타우린, 금잔화 분말

ingredients-1883 · db_list:1d434649