Top 10 Low‑Phosphorus Cat Foods to Support Kidney Health (2022 Guide)

Your cat has been diagnosed with chronic kidney disease (CKD) and your veterinarian has recommended a therapeutic diet to help treat this kidney (also called renal) condition.

Harmful waste products build up in the body of a cat with poor kidney function. One of the best ways to manage this problem is with a special diet that’s low in protein, phosphorus, and sodium and high in vitamins, fiber, and antioxidants.

There are low phosphorus commercial cat foods specially formulated for cats with kidney issues. Many kidney care diets require a veterinarian’s prescription, but some don’t.

These reviews will help you find the best cat food for kidney health for your cat. We’ll talk about both prescription and non-prescription options, so be sure to always follow your vet’s exact instructions when choosing cat food.

A Quick Comparison of Our Favorites

Image Product Details Best Overall Hill's Prescription k/d Kidney

Contains gravy to stimulate the appetite

Supports urinary tract health by reducing crystal formation

Chicken is the primary protein source

Check price Best Value Purina Pro Plan Veterinary Diets

Proper amounts of protein and phosphorus

Primary animal protein is tuna

With Omega-3 fatty acids + antioxidants

Check price Premium Choice Royal Canin Diet Renal Support

Energy-dense food for cats that eat smaller meals

Contains antioxidants and fatty acids from fish oil

The main animal protein is chicken

Check price Blue Buffalo Natural Veterinary KM

Contains real chicken, not by-products

Supports kidney health and joint health

Good for mobility in older cats

Check price Forza10 Renal ActiWet Renal Support

Does not require a veterinary prescription

Contains no meat by-products or GMOs

Lamb is the first ingredient

Check price

The 10 Best Cat Foods for Kidney Disease (Low Phosphorus) – Reviews  & Top Picks 2022

1. Hill’s Prescription Diet k/d Kidney Care Chicken & Vegetable Stew Canned Cat Food – Best Overall

Check Price on Chewy Check Price on Amazon Phosphorus: .49% Protein: 30% Sodium: .23% Calories: 70 kcal/2.9 oz can

Hill’s Prescription Diet k/d Kidney Care Chicken & Vegetable Stew Canned Cat Food is our pick for best overall cat food for kidney disease. This popular food requires a veterinary prescription but is widely available.

It is a palatable wet food with chicken as the primary animal protein. As a kidney care diet, it has the right amounts of phosphorus, protein, and sodium to support your cat’s health.

Pros

• Contains gravy to stimulate the appetite
• Supports urinary tract health by reducing the risk of crystal formation

Cons

• Requires a veterinary prescription

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2. Purina Pro Plan Veterinary Diets NF Kidney Function Advanced Care Formula Dry Cat Food – Best Value

Check Price on Chewy Check Price on Amazon Phosphorus: .44% Protein: 26.5% Sodium: n/a Calories: 536 kcal/cup

Purina Pro Plan Veterinary Diets NF Kidney Function Advanced Care Formula Dry Cat Food is our pick for best cat food for kidney disease for the money.

Although it is a veterinary diet that requires a prescription, it is a better value than some other veterinary diets. This formula is low in phosphorus and protein for kidney health and contains omega-3 fatty acids and antioxidants to help support your cat’s overall health.

Pros

• Contains proper amounts of protein and phosphorus
• Primary animal protein is tuna

Cons

• Requires a veterinary prescription
• Cats need to drink more water with dry food diets

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3. Royal Canin Veterinary Diet Renal Support D Thin Slices in Gravy Canned Cat Food – Premium Choice

Check Price on Chewy Check Price on Amazon Phosphorus: .14% Protein: 10% Sodium: n/a Calories: 98 kcal/can

Royal Canin is a quality veterinary diet that is often the preferred choice of veterinarians. This kidney health prescription diet gets high marks from the owners of picky cats. The D stands for “delectable” and the morsels in gravy formula helps to stimulate your cat’s appetite.

Pros

• An energy-dense formula for cats that eat smaller meals
• Contains antioxidants and fatty acids from fish oil
• The main animal protein is chicken

Cons

• Requires a veterinary prescription

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4. Blue Buffalo Natural Veterinary Diet KM Kidney + Mobility Support Dry Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .7% Protein: 26% Sodium: .35% Calories: 425 kcal/cup

This is a prescription kidney diet that has controlled levels of protein, phosphorus, and sodium for kidney health. It is grain-free, and the primary animal protein is chicken. It also has the added benefit of joint health ingredients like glucosamine and chondroitin, good for older cats with both mobility and kidney issues.

Pros

• Contains real chicken, not by-products
• Supports kidney health and joint health

Cons

• Requires a veterinary prescription
• Cats need to drink more water with dry food diets

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5. Forza10 Renal ActiWet Renal Support Canned Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .13% Protein: 6% Sodium: .06% Calories: 80 kcal/tray

This is a kidney care diet that does not require a veterinarian’s prescription (check with your vet before buying). It’s made with lamb and contains no corn, wheat, or soy. In addition to having low amounts of phosphorus, protein, and sodium, it also has natural plant ingredients like cranberry for added renal support.

Pros

• Does not require a veterinary prescription
• Contains no meat by-products or GMOs

Cons

• Your vet may prefer a prescription veterinary diet

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6. Hill’s Prescription Diet k/d Kidney Care with Ocean Fish Dry Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .52% Protein: 29.8% Sodium: .26% Calories: 444 kcal/cup

This Hill’s kidney care dry cat food gets high marks from owners of finicky feline eaters who prefer fish-flavored cat food. Formulated with controlled phosphorus and low sodium for kidney health, it also contains l-carnitine and omega-3 fatty acids to support your cat’s overall health.

Pros

• Enhanced Appetite Trigger (E.A.T.) technology to stimulate appetite
• High levels of essential amino acids

Cons

• Requires a veterinary prescription
• Cats need to drink more water with dry food diets

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7. Royal Canin Veterinary Diet Renal Support E Canned Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .14% Protein: 9% Sodium: n/a Calories: 151 kcal/can

This is another Royal Canin veterinary kidney diet option. With this variety, the E stands for “enticing” and it is designed to stimulate your cat’s appetite. It comes in a loaf-in-sauce form and is energy-dense, so it provides more nutritional support for cats that eat small portions.

Pros

• Formulated with proper phosphorus and protein levels
• Contains antioxidants and fatty acids from fish oil

Cons

• Requires a veterinary prescription

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8. Forza10 Nutraceutic Active Kidney Renal Support Diet Dry Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .8% Protein: 26% Sodium: .24% Calories: 461 kcal/cup

You don’t need a veterinarian’s prescription to buy this Forza10 kidney support food, although it’s a good idea to check with your vet before buying. Like prescription renal diets, it has low phosphorus, protein, and sodium. It also contains therapeutic plant extracts and omega-3 fatty acids from anchovy for your cat’s overall health.

Pros

• Does not require a veterinary prescription
• Contains natural antioxidant and anti-inflammatory ingredients

Cons

• Your vet may prefer a prescription veterinary diet
• Cats need to drink more water with dry food diets

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9. Hill’s Prescription Diet k/d Early Support Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .56% Protein: 34% Sodium: .25% Calories: 536 kcal/cup

This version of Hill’s Prescription Diet k/d is formulated for cats with early kidney disease. It provides early protection of kidney function and is also designed to stimulate your cat’s appetite. It is low in phosphorus and sodium and contains omega-3 fatty acids, essential amino acids, and l-carnitine.

Pros

• Designed specifically for early kidney disease
• Enhanced Appetite Trigger (E.A.T.) technology to stimulate appetite

Cons

• Requires a veterinary prescription
• Not designed for advanced kidney disease

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10. Purina Pro Plan Veterinary Diets NF Kidney Function Advanced Care Formula Canned Cat Food

Check Price on Chewy Check Price on Amazon Phosphorus: .12% Protein: 6% Sodium: n/a Calories: 164 kcal/can

A canned veterinary diet prescription-only cat food for cats with advanced kidney disease and kidney failure. Low amounts of sodium, phosphorus, and protein reduce the workload of damaged kidneys and help your cat feel more comfortable.

Pros

• Specifically designed for advanced kidney disease
• Contains added B-complex vitamins

Cons

• Requires a veterinary prescription
• Not designed for cats with early kidney disease

Buyer’s Guide

What are the key factors to keep in mind when deciding on the best cat food for renal failure? The most important thing is to follow your veterinarian’s recommendations.

Vets Recommend

• Most cat food for kidney disease requires a prescription. This is because cats with impaired kidney function have unique nutritional needs that are very different from cats with normal kidneys.
• Therapeutic kidney diets contain controlled amounts of phosphorus, protein, and sodium, but amounts (and other ingredients) vary from brand to brand. If your vet prescribes a particular food for your cat, be sure to follow the treatment plan.
• Cats with kidney disease often have small appetites so finding a food that your cat will eat is important. Talk to your vet about alternative foods to try if your cat doesn’t like the first one.
• You can choose dry, wet, or a combination of both, but be sure to provide plenty of water if your cat prefers dry food. With some patience, you and your vet can find the right kidney diet for your cat.

There are a couple of other common-sense tips to keep in mind!

• If you have multiple cats and only one has kidney disease, make sure to feed your cats separately so that they don’t eat each other’s food.
• Be sure not to confuse kidney/renal care cat food with urinary care cat food. Veterinary diets for urinary health are designed to prevent the formation of crystals in your cat’s urinary tract. It is a different dietary formulation than food for kidney disease.

Conclusion

 Let’s recap our reviews and top picks!

Hill’s Prescription Diet and Royal Canin Veterinary Diet are top choices of veterinarians. Each manufacturer has several varieties in their renal support cat food lines. Your vet may prefer one company over the other, but both are very good.

For best overall cat food for kidney disease, we like Hill’s Prescription Diet k/d Kidney Care Chicken & Vegetable Stew Canned Cat Food and Royal Canin Veterinary Diet Renal Support D Thin Slices in Gravy Canned Cat Food. Both are well-formulated for kidney disease and palatable to most cats.

Be sure to talk to your vet if you have questions or concerns about your cat’s health and diet.

• You may also be interested in: 10 Best Cat Foods for Pancreatitis in 2021 – Reviews & Top Picks