Hill's Science Diet Indoor Adult 1-6 Chicken Recipe
Hill's Science Diet Indoor Adult 1-6 Chicken Recipe scores 3.5/5 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 — 38% 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 Science Diet Indoor Adult 1-6 Chicken Recipe dry cat food good?
Hill's Science Diet Indoor Adult 1-6 Chicken Recipe is a dry cat food rated 3.5 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 Dairy, Egg, Nuts, Red meat, Shellfish, Unknown Meal but contains Gluten grains, Legumes, 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.
Ingredients Analysis
44 of 44 matched
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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.
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2 Whole Grain Wheat
CarbsDescription
The most common inexpensive filler in lower-grade pet foods. Other than carbs and fiber, it does not contain important nutrients for dogs / cats.
Why Concerned?
A common 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.
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3 Corn Gluten Meal
Plant Protein ConcentrateDescription
Produced during wet milling of corn by separating protein from the starch. It contains 60% of protein, a relatively inexpensive source to boost up the protein level 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.
Allergen Concern
Made with corn, which is 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
A high dose of plant-based protein is hard for digestion and offers much less biological value (less absorbed by the body) to pets compared to animal protein.
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4 Powdered Cellulose
CarbsDescription
The substance provides strength and rigidity to plants, which are mostly made of insoluble fiber. It is commonly added to pet foods to reduce the calorie content for the "weight management" type.
Why Notice?
Unspecified plant products made of unknown sources. Its quality is highly concerned, often seen in low quality pet foods.
Digestion Concern
Dogs and cats lack the enzymes capable of digesting cellulose. A high level of fiber could interfere with the digestion of protein and other minerals.
Uncertain/Risky
Could be made up of cheap and unwanted fiber by-products. However, from our research, most cellulose used in pet food is made up of pine trees.
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5 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.
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6 Brown Rice
CarbsDescription
Whole grain rice with its bran and germ remained, high in carbs and fiber. Studies have shown that rice bran depletes taurine in cats, which is an essential amino acid.
Why Concerned?
A common filler without gluten, with limited nutrition value to dogs / cats.
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7 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.
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8 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.
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9 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.
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10 Chicken Liver Flavor
Food AdditiveDescription
The flavor made of chicken parts, it is used to make pet food more tasty and palatable.
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11 Soybean Oil
FatDescription
The oil extracted from soybeans, an inferior option as it contains more saturated fats than the majority of vegetable oils.
Why Concerned?
A controversial, less optimal choice of fat.
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12 Lactic Acid
Food AdditiveDescription
A by-product of fermentation, used as a food preservative, especially for microbial control including Salmonella in pet foods.
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13 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.
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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.
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15 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.
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16 Choline Chloride
SupplementDescription
Vital molecule for various functions in the body, lack of choline can result in weight loss, vomiting, and fatty liver.
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17 Iodized Salt
OthersDescription
Mainly added to enhance the flavor, might cause kidney and blood pressure issues in a larger dose. High-quality pet foods should get a sufficient amount from raw meat, additional salt is not necessary.
Why Concerned?
A controversial ingredient that might cause health issues, unnecessary for the risk.
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18 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.
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19 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.
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20 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.
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21 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.
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22 Niacin Supplement
SupplementDescription
Known as vitamin B3, essential to maintain healthy GI tracts, skin/coat, and nervous system.
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23 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.
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24 Vitamin A Supplement
SupplementDescription
Supplement of vitamin A, it is essential for healthy skin, normal vision, and immune function.
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25 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.
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26 Riboflavin Supplement
SupplementDescription
A synthetic supplement for vitamin B2. which is vital for the body's metabolism and health.
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27 Biotin
SupplementDescription
A water-soluble vitamin B that is important for maintaining healthy skin, coat, and nails.
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28 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.
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29 Pyridoxine Hydrochloride
SupplementDescription
A synthetical supplement of vitamin B6, which is an essential element for nearly every part of metabolism.
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30 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.
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31 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).
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32 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).
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33 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.
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34 Dicalcium Phosphate
SupplementDescription
A supplement for calcium and phosphorus. It is mainly used to improve the texture of pet foods. It is also found in some toothpaste as a polishing agent.
Why Notice?
A risky supplement that can cause health issues, backed by research studies.
Digestion Concern
It does not absorb any water, almost insoluble, and becomes very hard in digesting.
Uncertain/Risky
Studies show that it can cause the formulation of kidney stones.
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35 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.
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36 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.
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37 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.
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38 Manganese 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.
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39 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.
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40 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.
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41 L-carnitine
SupplementDescription
An amino acid that is naturally produced in the body. It is often added to pet foods because the normal cooking process degrades its availability from whole food.
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42 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.
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43 Natural Flavor
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.
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44 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 Gluten Meal, Wheat Gluten may raise the listed protein percentage without meaning there is more meat.
- Higher-priority ingredients to review: Corn Gluten Meal, Powdered Cellulose, Wheat Gluten.
- Higher-caution ingredients: Powdered Cellulose, Dicalcium Phosphate have caution notes in the ingredient database.
- Possible allergy triggers: Whole Grain Wheat, Corn Gluten Meal, Wheat Gluten have allergen notes; review them if your pet has sensitivities.
Protein Analysis
How this recipe earned its protein scores.
Protein Clarity
High- Named 100%
Strong clarity: 100% of Hill's Science Diet Indoor Adult 1-6 Chicken Recipe'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 38%
- Plant concentrate 63%
Protein in Hill's Science Diet Indoor Adult 1-6 Chicken Recipe leans on plant signals: only 38% comes from animal sources, while plant-protein concentrates make up 63% 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 Science Diet Indoor Adult 1-6 Chicken Recipe dry cat food Review
Hill's Science Diet Indoor Adult 1-6 Chicken Recipe is a solid mid-tier dry cat food at 3.5 stars, with high ingredient transparency and limited animal protein content. It has clear strengths alongside a few trade-offs worth weighing.
Best for
- Owners who want clearly named protein sources
Avoid if
- Your pet has a grain or gluten sensitivity
- You're avoiding legumes
- You're avoiding plant-protein concentrates like pea or soy isolate
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 Gluten Meal, Wheat Gluten.
- Contains common allergens: Gluten grains, Legumes, Poultry, Fish.
- Free from Dairy, Egg, Nuts, Red meat, Shellfish, Unknown Meal.
- Overall rating: 3.5 stars, based on transparency, protein source, and macro balance.
Frequently asked questions
Is Hill's Science Diet Indoor Adult 1-6 Chicken Recipe good for cats?
Mostly — Hill's Science Diet Indoor Adult 1-6 Chicken Recipe is a solid mid-tier choice at 3.5 out of 5 stars on Moesonson’s label-based analysis, pairing high ingredient transparency with limited animal protein content. It shows real strengths alongside a few trade-offs, so weigh the ingredient list against your cat’s needs — allergies, life stage and protein preference.
Does Hill's Science Diet Indoor Adult 1-6 Chicken Recipe contain Dairy?
No — based on the printed ingredient list, Hill's Science Diet Indoor Adult 1-6 Chicken Recipe does not include Dairy or closely related ingredients, so pets sensitive to Dairy 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 Science Diet Indoor Adult 1-6 Chicken Recipe contain Egg?
No — based on the printed ingredient list, Hill's Science Diet Indoor Adult 1-6 Chicken Recipe 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 Science Diet Indoor Adult 1-6 Chicken Recipe contain Legumes?
Yes — according to the printed ingredient list, Hill's Science Diet Indoor Adult 1-6 Chicken Recipe 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 Science Diet Indoor Adult 1-6 Chicken Recipe contain Nuts?
No — based on the printed ingredient list, Hill's Science Diet Indoor Adult 1-6 Chicken Recipe does not include Nuts or closely related ingredients, so pets sensitive to Nuts 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.
Is Hill's Science Diet Indoor Adult 1-6 Chicken Recipe grain-free?
No — Hill's Science Diet Indoor Adult 1-6 Chicken Recipe 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 Science Diet Indoor Adult 1-6 Chicken Recipe?
The main animal proteins in Hill's Science Diet Indoor Adult 1-6 Chicken Recipe are Chicken, Chicken Meal. 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.
