Royal Canin
S37 Sterilised
Rating
Is Royal Canin S37 Sterilised dry cat food good?
Royal Canin S37 Sterilised is a dry cat food rated 0.5 stars, with low ingredient transparency and limited animal protein content. However, several animal ingredients are described in generic terms, which reduces sourcing transparency. 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
- Includes plant ingredients that can provide fiber and natural antioxidants.
Cons
- Contains several unnamed animal ingredients, which reduces ingredient transparency.
- Some non-animal ingredients are not clearly identified, which reduces formula transparency.
Nutrition Breakdown
- Protein 41%
- Fat 13%
- Est. Carbs 30%
- Fiber 7%
- Ash 9%
Moisture (10%) removed so you can compare foods fairly.
Dry matter basis = label value ÷ (100% − moisture%). Carbs estimated from remaining.
- Protein 37%
- Fat 12%
- Est. Carbs 27%
- Fiber 6%
- Moisture 10%
- Ash 8%
As-fed values are the raw percentages printed on the product label.
Tips
- Protein is High (41% dry matter) on our label-based comparison range. This is generally more aligned with cats' higher protein needs than lower-protein recipes, assuming the food is complete for the cat's life stage.
- Fat is Medium (13% 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
15 of 15 matched
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1 Dehydrated Poultry Protein
Animal ProteinDescription
A dehydrated form of unnamed poultry products, a meat concentrate that could contain 400% more protein than fresh form. Poultry is a generic name that could include any domestic fowl like chicken, turkey, or duck of any condition.
Why Notice?
Often times generic name like poultry is used to cover the inferior meat quality from unknown sources, commonly found in low quality pet foods.
Uncertain/Risky
Unnamed poultry products could be made of "4-D animals" (dead, diseased, disabled, or dying prior to slaughter), turkey, chicken, roadkill, birds, which are not safe for consumption.
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2 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.
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3 Plant Protein Isolate
Plant Protein ConcentrateDescription
Concentrated plant protein from unspecified sources, used to boost protein content.
Why Concerned?
Unnamed plant protein source - quality and origin unclear.
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4 Vegetable Fiber
CarbsDescription
Fiber derived from vegetables, aids digestive health and stool quality.
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5 Animal Fat
FatDescription
Leftover fat during the production of unknown animal meat meal.
Why Notice?
Unspecified animal products from unknown sources. Its quality is highly concerned, often seen in low quality pet foods.
Uncertain/Risky
Could be made from any animals, including "4-D animals" (dead, diseased, disabled, or dying prior to slaughter). Contaminated meats can lead to severe illnesses.
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6 Hydrolysed Animal Protein
(Detected): Hydrolyzed Animal Protein
Animal ProteinDescription
Animal protein broken down into smaller parts by using enzymes in a process called "Hydrolysis". MSG (food enhancer) is formed during the process.
Why Notice?
Unspecified animal products from unknown sources. Its quality is highly concerned, often seen in low quality pet foods.
Uncertain/Risky
Could be made from any animals, including "4-D animals" (dead, diseased, disabled, or dying prior to slaughter). Contaminated meats can lead to severe illnesses.
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7 Rice
CarbsDescription
Without its bran and germ (the main source of nutrients), white rice is considered as "empty carbs".
Why Concerned?
A common filler without gluten, with limited nutrition value to dogs / cats.
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8 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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9 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 Corn Gluten
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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11 Yeast
Plant Protein ConcentrateDescription
Made from fungus and often used to make beer, a rich source of minerals such as selenium. B-complex vitamins, and chromium. It contains around 40% protein.
Why Concerned?
A controversial ingredient, some believe it can support the immune system, while others say it can be linked to allergies and bloating. However, no scientific research can provide a concrete conclusion.
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12 Minerals
SupplementDescription
A general term for mineral supplementation, specific sources not identified.
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13 Fish Oil
FatDescription
Oil derived from fish, rich in omega-3 fatty acids, DHA, and EPA.
Why Concerned?
A high-quality animal fat with high digestibility and biological value.
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14 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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15 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.
Tips
- Some protein sources are less clear: Dehydrated Poultry Protein appear near the top without a clearly defined animal source.
- Plant protein is worth closer review for cats: Plant Protein Isolate, Corn Gluten may raise the listed protein percentage without meaning there is more meat.
- Higher-priority ingredients to review: Dehydrated Poultry Protein, Animal Fat, Hydrolysed Animal Protein.
- Higher-caution ingredients: Dehydrated Poultry Protein, Animal Fat, Hydrolysed Animal Protein have caution notes in the ingredient database.
- Possible allergy triggers: Corn, Wheat, Corn Gluten have allergen notes; review them if your pet has sensitivities.
Protein Analysis
How this recipe earned its protein scores.
Protein Clarity
Low- Unnamed 100%
Low clarity: only 0% of Royal Canin S37 Sterilised's animal-protein ingredients are clearly named. 100% use vague terms such as "meat meal" and 0% are by-products. Named protein ingredients let you verify the source and spot allergens; vague ones don't.
Contributing ingredients
Unnamed
Animal Protein
Low- Animal 44%
- Plant concentrate 55%
- Auxiliary 1%
Protein in Royal Canin S37 Sterilised leans on plant signals: only 44% comes from animal sources, while plant-protein concentrates make up 55% 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
Auxiliary
Royal Canin S37 Sterilised dry cat food Review
Royal Canin S37 Sterilised scores 0.5 stars on this analysis, with low ingredient transparency and limited animal protein content. There are several concerns in this label that may make it a poor fit.
Avoid if
- Your pet has a grain or gluten sensitivity
- You're avoiding legumes
- Ingredient transparency is non-negotiable
Key takeaways
- Plant-protein concentrates appear in the top 10 ingredients: Plant Protein Isolate, Corn Gluten.
- Contains common allergens: Gluten grains, Legumes, Poultry, Fish.
- On a dry-matter basis: 41% protein, 13% fat, 30% estimated carbohydrates.
- Free from Dairy, Egg, Nuts, Red meat, Shellfish, Unknown Meal.
- Overall rating: 0.5 stars, based on transparency, protein source, and macro balance.
Frequently asked questions
Is Royal Canin S37 Sterilised good for cats?
This recipe scored 0.5 stars, with low ingredient transparency and limited animal protein content. Worth understanding the concerns before choosing it for your cat.
Does Royal Canin S37 Sterilised contain Dairy?
No — based on the ingredient list, Royal Canin S37 Sterilised doesn't include Dairy or related ingredients, so pets sensitive to Dairy can typically avoid this allergen here.
Does Royal Canin S37 Sterilised contain Egg?
No — based on the ingredient list, Royal Canin S37 Sterilised doesn't include Egg or related ingredients, so pets sensitive to Egg can typically avoid this allergen here.
Does Royal Canin S37 Sterilised contain Legumes?
Yes — based on the ingredient list, Royal Canin S37 Sterilised contains Legumes, so pets sensitive to Legumes should generally avoid this product or consult a vet first.
Does Royal Canin S37 Sterilised contain Nuts?
No — based on the ingredient list, Royal Canin S37 Sterilised doesn't include Nuts or related ingredients, so pets sensitive to Nuts can typically avoid this allergen here.
Is Royal Canin S37 Sterilised grain-free?
No — the recipe contains Gluten grains.
What are the main protein sources in Royal Canin S37 Sterilised?
Animal proteins include Dehydrated Poultry Protein, Hydrolysed Animal Protein, though some are listed in generic terms rather than by species.
