Feline Renal Support F Dry Cat Food
Verified Jun 10, 2026
This is a prescription dry diet formulated specifically for adult cats with chronic kidney issues. It provides moderate protein, controlled phosphorus, and relatively high calories per cup, which helps cats maintain weight even when they’re not eating large amounts. Added omega-3s from fish oil, fermentable fibers, and prebiotics support overall health and digestive comfort in cats with kidney disease.
This renal-support formula is well designed for cats with chronic kidney disease who need a controlled-phosphorus, energy-dense diet under veterinary supervision. The moderate protein, relatively high fat, and restricted phosphorus help reduce kidney workload while still providing enough calories in a small volume of food. It’s generally a strong option for cats that prefer dry food and need kidney support plus extra energy to maintain body condition.
The KibbleLab Score (1–10) is assessed from publicly available product data. Our evaluation is science-based, not marketing-based.
KibbleLab may earn an affiliate commission when you buy through a link. No one can pay for a higher score, or to change what we recommend for your pet.
At a Glance
KibbleLab Review
Strengths
- Formulated specifically for kidney support, with phosphorus held to a relatively low level for a dry food renal diet.
- Energy-dense at about 376 kcal per cup, which helps cats maintain weight when they are eating less.
- Includes fish oil as a source of EPA and DHA, which can be beneficial in many kidney patients.
- Uses prebiotic fibers like chicory root and fructooligosaccharides that may support digestive health.
Considerations
- This is a prescription diet and should only be used under the guidance of your veterinarian.
- Main ingredients are grains and plant proteins, which may not suit owners looking for a meat-heavy formula, though this approach is intentional in renal diets.
- Contains chicken fat and pork digest, so it is not suitable for cats with known chicken or pork fat sensitivities.
- Dry food may not provide as much water intake as a wet renal diet, which can be a consideration for some cats with kidney disease.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Brewer's Rice
Brewer’s rice is a milling byproduct of rice processing made up of small broken white rice kernels commonly used in pet foods as a highly digestible carbohydrate source, filler and binder that provides readily available energy for dogs and cats while contributing little protein, fat or fiber. It is generally gentle on the stomach and cost‑effective, but diets using it must supply other ingredients for essential nutrients; pet owners should note its relatively high glycemic load (relevant for weight or diabetic pets), the potential for trace environmental contaminants associated with rice, and not confuse it with brewer’s yeast.
02
Corn
Corn is commonly used in dog and cat foods as a digestible source of carbohydrates and calories, and it also provides some plant protein, fiber, B vitamins and minerals while helping with kibble structure and palatability. While generally safe and economical, corn is relatively high in starch and has an incomplete amino acid profile for obligate carnivores (cats), can be a source of mycotoxin contamination if poorly stored, and although true corn allergies are uncommon, some pets may be sensitive, so quality and proper formulation with animal proteins are important.
03
Wheat Gluten
Wheat gluten is a concentrated plant protein commonly used in dry pet foods as a protein booster, binder and texture improver to help form kibble and extend meat-based ingredients. It provides digestible protein for dogs and cats but is low in certain essential amino acids (notably lysine) and lacks animal-specific nutrients like taurine, so it should not be the sole protein source; pets with wheat or gluten sensitivities may also experience allergic or gastrointestinal reactions.
04
Chicken Fat
Chicken fat is used in dog and cat foods as a concentrated energy and flavor source that supplies essential fatty acids (notably linoleic acid) and aids absorption of fat‑soluble vitamins, improving palatability and supporting skin and coat health. Because it is calorie‑dense, diets must account for added fat to prevent weight gain, and quality (proper rendering and antioxidant protection to prevent rancidity) is important; although fats are less commonly allergenic than proteins, pets with poultry sensitivities may still react in some cases.
05
Pork Digest
Pork digest is an enzyme‑hydrolyzed pork protein used primarily as a natural flavoring and palatability enhancer in dog and cat foods, supplying small amounts of free amino acids and peptides but not serving as a balanced primary protein source. It can improve acceptance of diets but may provoke reactions in pets with pork allergies, and its variable, concentrated nature means manufacturers and pet parents should be aware it can obscure ingredient sources and contribute additional flavoring or sodium.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
Brand
Royal Canin is a premium pet food brand offering highly specific diets tailored to different breeds, life stages, sizes, and health conditions of dogs and cats. The brand is known for its science-driven approach and collaboration with veterinarians and pet professionals.
Visit Royal CaninWSAVA publishes criteria for evaluating a manufacturer (qualified nutritionists, feeding trials, published research); it does not certify or endorse brands.
Manufacturer
Royal Canin operates manufacturing facilities globally with strict quality control processes and adheres to ISO certification standards. The company maintains full traceability of ingredients, follows HACCP principles, and complies with local and international pet food safety regulations including EU and FDA requirements.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Royal Canin Feline Renal Support F Dry Cat Food has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
Sign up for the full picture
Feeding Calculator
Personalized portion sizes based on your pet's weight, age, and activity level.
Get startedSimilar Foods
Post your cat's report card and challenge friends to check their food.
Frequently Asked Questions
Has Royal Canin ever been recalled?
We have no recalls on record for Royal Canin. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
Continue with Google
Continue with Facebook