Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken
Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken scores 2/5 on Moesonson's label-based analysis. Its strongest factor is protein clarity (high — 100% of the recipe's protein panel is clearly named); its weakest is animal-protein content (limited — 32% of the weighted protein comes from animal sources).
Rating
Updated Jul 2026
How this score is made
This score isn’t a hand-wavy impression: it reads what the label actually prints — the ingredient list, guaranteed analysis and AAFCO adequacy statement — and runs it through the same algorithmic rubric as every other product. No brand pays for placement, and there are no affiliate links on reviewed products.
Is Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken dry cat food good?
Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken is a dry cat food rated 2 stars, with high ingredient transparency and limited animal protein content. The recipe lists most animal ingredients by name and features real muscle meat as a primary protein source. However, most minerals are supplied in inorganic forms that may be less well absorbed. This recipe is free from Egg, Red meat, Shellfish, Unknown Meal but contains Gluten grains, Dairy, Legumes, Nuts, Poultry, Fish.
Allergy Highlights
Contains:
Free From:
Pros
- Uses clearly named animal protein sources for better transparency.
- Includes plant ingredients that can provide fiber and natural antioxidants.
Cons
- Relies mostly on inorganic mineral supplements, which may be less bioavailable.
Nutrition Breakdown
| Protein | 35% |
|---|---|
| Fat | 15% |
| Est. Carbs | 36% |
| Fiber | 7% |
| Ash | 8% |
Moisture (8%) removed so you can compare foods fairly.
Dry matter basis = label value ÷ (100% − moisture%). Carbs estimated from remaining.
| Protein | 33% |
|---|---|
| Fat | 14% |
| Est. Carbs | 33% |
| Fiber | 6% |
| Moisture | 8% |
| Ash | 7% |
Ash value not listed on label; 7% used as a standard estimate.
As-fed values are the raw percentages printed on the product label.
Tips
- Protein is Medium (35% dry matter) on our label-based comparison range. Cats usually benefit from higher protein than dogs, so confirm the food is complete for cats and fits the cat's life stage.
- Fat is Medium (15% dry matter) on our label-based comparison range. This is a moderate energy-density signal for many cats, but total calories and body condition still matter.
Ingredients Analysis
47 of 47 matched
-
1 Chicken
Animal ProteinDescription
The dominant animal protein source in pet foods. Other than protein, it is also high in iron, zinc, selenium, and B vitamins.
Why Prefer?
A high-quality animal protein with high digestibility and biological value.
-
2 Brewers Rice
CarbsDescription
Small milled fragments (5/164 of an inch) of rice kernels that have been separated from the larger kernels of milled rice. “Dust” and “floor sweepings” from rice.
Why Concerned?
A common filler without gluten, with limited nutrition value to dogs / cats.
-
3 Corn Protein Meal
Plant Protein ConcentrateDescription
A concentrated corn protein similar to corn gluten meal, used to boost protein levels.
Why Notice?
High level of plant-based protein is not easy to digest and offers less biological value. Good quality pet foods should obtain sufficient protein from animal sources.
-
4 Chicken Fat
FatDescription
The fatty layer separated during the cooking process, with a high level of omega 6, It is more preferable by dogs and cats over other types of fats.
Why Prefer?
A high-quality animal fat with high digestibility and biological value.
-
5 Wheat Gluten
Plant Protein ConcentrateDescription
Protein concentrate made by removing the starch of wheat flour, it contains around 70% plant protein.
Why Notice?
High level of plant-based protein is not easy to digest and offers less biological value. Good quality pet foods should obtain sufficient protein from animal sources.
Allergen Concern
Contains gluten, which is one of the most common allergens that can cause skin rashes, itchiness, and irritation.
Digestion Concern
Gluten intolerances can cause damage to the gastrointestinal tract, may result in diarrhea and discomfort stomach. A high level of plant-based protein is not easily digestible.
-
6 Pea Protein
Plant Protein ConcentrateDescription
Extracted protein from pea in a dry process. It contains 45 - 55% protein, which will significantly boost up the overall protein content of pet foods.
Why Notice?
High level of plant-based protein is not easy to digest and offers less biological value. Good quality pet foods should obtain sufficient protein from animal sources.
Digestion Concern
The process will concentrate the level of oligosaccharides, which is a 3 - 5 carbon short-chain sugar that is indigestible by dogs / cats. It offers much less biological value (less absorbed by the body) to pets compared to animal protein.
-
7 Whole Grain Corn
CarbsDescription
A grain that is often referred as "cheap filler" in pet foods, mainly due to its high carbs content and low to moderate nutrition profile.
Why Concerned?
A controversial filler with limited nutrition value to dogs / cats.
Allergen Concern
One of the most reported ingredients to be the likely cause of allergies. This could be due to the undiscovered contaminants within corns. Contrary to the real situation, studies show that the chance of getting corn allergy is 14% and only accounts for 3% of allergies.
Digestion Concern
It is high in cellulose, which is an insoluble fiber that is hard to digest.
-
8 Chicken Meal
Animal ProteinDescription
A dehydrated form of chicken, it is a meat concentrate that contains up to 4 times more protein than fresh chicken on dry matter basis.
Why Prefer?
A high-quality animal protein with high digestibility and biological value.
-
9 Whole Grain Oats
CarbsDescription
A whole grain that has higher protein and fats compared to other types. It is rich in B-vitamins and dietary fiber.
Why Concerned?
An inexpensive filler without gluten, with limited nutrition value to dogs / cats.
-
10 Ground Pecan Shells
CarbsDescription
Pecan shell fiber (also known as pecan shell flour or ground pecan shells) is a food ingredient produced from shells of pecans, excluding the husks and nut kernels. In pet food, it is used as a source of fiber.
Why Concerned?
A controversial filler with limited nutrition value to dogs / cats.
-
11 Cracked Pearled Barley
CarbsDescription
A type of grain that is high in carbs and fiber, along with manganese and selenium.
Why Concerned?
An inexpensive filler with gluten, with limited nutrition value to dogs / cats.
Allergen Concern
Contains gluten, which is one of the most common allergens that can cause skin rashes, itchiness, and irritation.
Digestion Concern
Gluten intolerances can cause damage to the gastrointestinal tract, may result in diarrhea and discomfort stomach.
-
12 Dried Beet Pulp
CarbsDescription
The leftover pulp after sugar is extracted from sugar beets, contains higher fiber and less sugar compared to whole beets.
Why Concerned?
Controversial - Some say it is a good dietary fiber source, some believe it is just an inexpensive filler.
-
13 Flaxseed
FatDescription
One of the richest sources of plant-based omega 3s, well known for its anti-inflammatory properties. It contains around 41% of fat, 57% of the total fatty acids is omega 3s.
-
14 Fish Oil
FatDescription
Oil derived from fish, rich in omega-3 fatty acids, DHA, and EPA.
Why Concerned?
Fish oil is beneficial but the unnamed source makes quality assessment difficult.
-
15 Dried Citrus Pulp
OthersDescription
Dried pulp from citrus fruits, a source of pectin fiber and flavonoids.
-
16 Lactic Acid
Food AdditiveDescription
A by-product of fermentation, used as a food preservative, especially for microbial control including Salmonella in pet foods.
-
17 L-lysine
SupplementDescription
One of the essential amino acids that dogs and cats cannot produce by themselves therefore must be obtained from the diet. Usually, pet foods with a high amount of meat and legumes do not require this supplement as they are high in lysine naturally.
-
18 Taurine
SupplementDescription
An essential amino acid (building blocks of protein) to maintain a healthy brain and heart functions.
Why Prefer?
A safe supplement to improve the completeness of essential amino acids profile (the building block of protein).
-
19 Cranberries
CarbsDescription
High in vitamin C and antioxidants, it is also best known for fighting Urinary Tract Infections. While it could be true for humans, the effect on pets is yet to be confirmed by further research.
-
20 Pressed Cranberry Pomace
OthersDescription
Pressed cranberry pulp remaining after juice extraction.
Why Prefer?
Named fruit fiber source with antioxidant properties.
-
21 Potassium Chloride
SupplementDescription
An inorganic form of potassium, which offers 5 - 15% less absorption rate to the body. It is essential for important functions like nerve impulse transmission, muscle contraction, and carbon dioxide / oxygen transport.
-
22 Dl-methionine
SupplementDescription
Added to balance the amino acids profile of pet foods with limited amounts of meat protein. Meat / fish naturally contains methionine, which does not require extra supplements. It is sometimes used to help support urine acidification.
Why Concerned?
A safe supplement to improve the completeness of essential amino acids profile (the building block of protein). However, it could imply the lack of meat protein - usually in lower quality pet foods.
-
23 Choline Chloride
SupplementDescription
Vital molecule for various functions in the body, lack of choline can result in weight loss, vomiting, and fatty liver.
-
24 Vitamin E Supplement
SupplementDescription
Supplement for vitamin E, which is an important antioxidant that protects oxidative damages on cellular membranes by free radicals. A deficiency will result in symptoms like anorexia, depression, and dermatitis.
-
25 Niacin Supplement
SupplementDescription
Known as vitamin B3, essential to maintain healthy GI tracts, skin/coat, and nervous system.
-
26 Thiamine Mononitrate
SupplementDescription
An organic form of thiamine, has 5 - 15% more absorption rate than the inorganic form. It is important for energy production and glucose metabolism.
-
27 Vitamin A Supplement
SupplementDescription
Supplement of vitamin A, it is essential for healthy skin, normal vision, and immune function.
-
28 Calcium Pantothenate
SupplementDescription
An organic form of calcium, it is essential in the formation of bones / teeth and different cellular functions. Compare to inorganic form, it has 5 - 15% more absorption rate to the body.
-
29 Riboflavin Supplement
SupplementDescription
A synthetic supplement for vitamin B2. which is vital for the body's metabolism and health.
-
30 Biotin
SupplementDescription
A water-soluble vitamin B that is important for maintaining healthy skin, coat, and nails.
-
31 Vitamin B12 Supplement
SupplementDescription
Supplement for vitamin B12, which is vital for carbon transfer and propionate metabolism. A deficiency will result in symptoms similar to gastrointestinal disorders, such as diarrhea and weight loss.
-
32 Pyridoxine Hydrochloride
SupplementDescription
A synthetical supplement of vitamin B6, which is an essential element for nearly every part of metabolism.
-
33 Folic Acid
SupplementDescription
A synthetic form of folate, which is also known as vitamin B9. It plays an important role to support the body's functions, such as cell growth.
-
34 Vitamin D3 Supplement
SupplementDescription
Supplement for vitamin D3 (animal-derived), which is essential for calcium homeostasis - to maintain a constant concentration of calcium. A deficiency will result in osteopenia (lower bone mass).
-
35 L-ascorbyl-2-polyphosphate
SupplementDescription
Supplement for vitamin C, which can help to prevent oxidative damages by radicals, maintain healthy skin, and boost the immune system.
-
36 Fructo-oligo-saccharides
(Detected): Fructooligosaccharides
PrebioticsDescription
Known as FOS, a type of fiber derived from chicory roots, beets, or cane. It is added as prebiotics for good bacteria growth in the colon, which aids digestion.
-
37 Calcium Sulfate
SupplementDescription
An inorganic form of calcium, it is essential in the formation of bones / teeth and different cellular functions. Compare to organic form, it has 5 - 15% less absorption rate to the body.
-
38 Ferrous Sulfate
SupplementDescription
An inorganic form of iron. It is essential for the transport and movement of oxygen around the body. Compare to organic form, it has 5 - 15% less absorption rate to the body.
-
39 Zinc Oxide
SupplementDescription
An inorganic form of zinc, which is vital in skin function and wound healing, cell replication, the structure and function of biological membranes. Compare to organic form, it has 5 - 15% less absorption rate to the body.
-
40 Copper Sulfate
SupplementDescription
An inorganic form of copper, which is important for the production of blood cells, hair coat color pigmentation, and maintaining the nervous system. Compare to organic form, it has 5 - 15% less absorption rate to the body.
-
41 Manganous Oxide
SupplementDescription
An inorganic form of manganese that has 5 - 15% less absorption rate than the organic form. It is essential for the transport and movement of oxygen around the body.
-
42 Calcium Iodate
SupplementDescription
An inorganic form of calcium, it is essential in the formation of bones / teeth and different cellular functions. Compare to organic form, it has 5 - 15% less absorption rate to the body.
-
43 Sodium Selenite
Food AdditiveDescription
An inorganic selenium supplement. It remains controversial as the long term effect of consuming it is not known, and there is a much safer organic alternative available.
Why Concerned?
A food additive that is likely to be safe but unnecessary.
-
44 Dried Hydrolyzed Casein
Animal ProteinDescription
Slow-digesting dairy protein that releases amino acids slower than normal animal protein.
Why Concerned?
A high-quality animal protein with high digestibility and biological value. However, dairy products are best avoided for pets with sensitive digestion.
Allergen Concern
Contains lactose, which can cause skin rashes and discomfort for dogs / cats that are lactose intolerance.
Digestion Concern
Contains lactose, which can cause diarrhea and bloating for dogs / cats that are lactose intolerant.
-
45 Mixed Tocopherols
Food AdditiveDescription
A mixture of different types of vitamin E, usually found in plant oils, seed and green vegetables. They are powerful antioxidants used as a natural preservative to slow down the spoilage of food.
-
46 Natural Flavors
Food AdditiveDescription
Made of extracts from plant or animal sources to improve the taste of food.
Why Concerned?
Contrary to its name, natural flavors are highly processed and contain many chemical additives.
-
47 Beta-carotene
SupplementDescription
An antioxidant and a precursor to Vitamin A helps to regulate both cellular and immune responses.
Tips
- Cat formula needs review: cats rely heavily on animal protein, and this label does not show strong named animal protein near the top.
- Plant protein is worth closer review for cats: Corn Protein Meal, Wheat Gluten, Pea Protein may raise the listed protein percentage without meaning there is more meat.
- Higher-priority ingredients to review: Corn Protein Meal, Wheat Gluten, Pea Protein.
- Possible allergy triggers: Wheat Gluten, Whole Grain Corn, Cracked Pearled Barley, and 1 more have allergen notes; review them if your pet has sensitivities.
- Possible digestion triggers: Wheat Gluten, Pea Protein, Whole Grain Corn, and 2 more have digestion notes; watch tolerance if your pet has a sensitive stomach.
Protein Analysis
How this recipe earned its protein scores.
Protein Clarity
High- Named 100%
Strong clarity: 100% of Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken's animal-protein ingredients are clearly named (like chicken or salmon). Only 0% use vague terms such as "meat meal" and 0% are by-products. Named protein ingredients let you verify the source and check for allergens.
Contributing ingredients
Named
Animal Protein
Low- Animal 32%
- Plant concentrate 68%
Protein in Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken leans on plant signals: only 32% comes from animal sources, while plant-protein concentrates make up 68% and whole plant proteins 0%. Plant concentrates like pea or soy isolate are cheap protein boosters but lack the amino-acid profile pets need from meat.
Contributing ingredients
Animal
Plant concentrate
Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken dry cat food Review
Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken scores 2 stars on this analysis, with high ingredient transparency and limited animal protein content. There are several concerns in this label that may make it a poor fit.
Best for
- Owners who want clearly named protein sources
Avoid if
- Your pet has a grain or gluten sensitivity
- Your pet is allergic to dairy
- You're avoiding legumes
Key takeaways
- Named animal proteins make up 100% of the recipe's protein panel — a clear sourcing win.
- Plant-protein concentrates appear in the top 10 ingredients: Corn Protein Meal, Wheat Gluten, Pea Protein.
- Contains common allergens: Gluten grains, Dairy, Legumes, Nuts, Poultry, Fish.
- On a dry-matter basis: 35% protein, 15% fat, 36% estimated carbohydrates.
- Free from Egg, Red meat, Shellfish, Unknown Meal.
Frequently asked questions
Is Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken good for cats?
Based on its label, Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken is hard to recommend — it scores 2 out of 5 stars on Moesonson’s analysis, with high ingredient transparency and limited animal protein content. Both factors come straight from the printed ingredient list, so review the full breakdown of concerns before choosing it for your cat.
Does Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contain Dairy?
Yes — according to the printed ingredient list, Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contains Dairy. Pets with a known Dairy sensitivity should generally avoid this recipe, or check with a veterinarian first. Moesonson flags allergens directly from the label’s ingredient panel, so this reflects what the manufacturer actually declares.
Does Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contain Egg?
No — based on the printed ingredient list, Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken does not include Egg or closely related ingredients, so pets sensitive to Egg can typically avoid that trigger here. Recipes do get reformulated, though, so re-check the packaging before feeding — Moesonson’s reading reflects the label at analysis time.
Does Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contain Legumes?
Yes — according to the printed ingredient list, Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contains Legumes. Pets with a known Legumes sensitivity should generally avoid this recipe, or check with a veterinarian first. Moesonson flags allergens directly from the label’s ingredient panel, so this reflects what the manufacturer actually declares.
Does Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contain Nuts?
Yes — according to the printed ingredient list, Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken contains Nuts. Pets with a known Nuts sensitivity should generally avoid this recipe, or check with a veterinarian first. Moesonson flags allergens directly from the label’s ingredient panel, so this reflects what the manufacturer actually declares.
Is Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken grain-free?
No — Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken is not grain-free: the printed ingredient list includes Gluten grains. That mainly matters for pets with a diagnosed grain sensitivity or allergy; most cats tolerate grains well as an energy source. If your cat must avoid grains, choose a recipe without these ingredients.
What are the main protein sources in Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken?
The main animal proteins in Hill's Prescription Diet Gastrointestinal Biome Stress with Chicken are Chicken, Chicken Meal, Dried Hydrolyzed Casein. Each is named by species on the printed ingredient list — a protein-clarity strength in Moesonson’s scoring, because named sources let you verify what your cat is eating and avoid specific proteins when managing food allergies.
