Last Updated: 05/08/2026
Best Food for Cats with Kidney Disease
Your cat has been diagnosed with CKD - here's what to feed them. Vet-reviewed prescription diet picks, safe treats, and tips for fussy eaters.
Author: Dr Gillian Hill BVSc (Hons)
Reading Time: 7 minutes - short read
If your cat has been diagnosed with chronic kidney disease (CKD) - sometimes called kidney failure or renal failure - the first thing your vet will likely recommend is a prescription diet. Prescription renal diets are formulated with restricted phosphorus, moderated high-quality protein, and added omega-3 fatty acids, and clinical studies have shown they significantly slow disease progression and extend survival time compared to standard adult food (Ross et al., 2006).
This article covers the best food options across prescription and over-the-counter diets, what to avoid, and how to get a fussy cat eating their new food. For a detailed breakdown of how renal diets work, see our guide to kidney nutrition for cats.
For a broader overview of CKD causes, staging, and treatment, see our guide to kidney disease in cats.
In this article
How we review our products
Our Vet team use their health and husbandry knowledge, along with their own personal and clinical experiences to evaluate each product and provide detailed, informative reviews, free of any commercial bias. We then collate this information into our 'best of' recommendations.
What are the best prescription foods for cats with kidney disease?
Prescription renal diets are the gold standard for CKD management, particularly from Stage 2 onwards. They require your treating vet's recommendation and are formulated specifically to reduce the workload on compromised kidneys.
Hill's Prescription Diet k/d
Pros
- Strong clinical evidence base
- Widely accepted by cats
- Good wet food variety; available in chicken, salmon and tuna options, and chunks, pate and stew texture varieties
- Dry format available as a standard dry kibble or as a dual-action formula that supports both kidney and joint mobility - making it an ideal choice for senior cats.
Cons
- Can be expensive long-term
- Some cats find the dry formula less appealing than their previous food
- Not made in Australia
Best for: Most cats with confirmed CKD at any stage
Available in wet (pouches and cans) and dry formats, Hill's k/d is one of the most researched renal diets on the market. The wet range tends to have good palatability, and an excellent range of flavours and textures, which matters when you're trying to get a sick or fussy cat to eat consistently.
What our customers say: "My cat has chronic kidney disease, and it took a few tries and fails to find a wet food kidney-care option that my cat would even go near. My cat loves this chicken stew, and it has helped her so much. Her disease progression has slowed down. She is doing great for over a year now. My vet recommended this product to me. Very happy." - Tamara
Royal Canin Early Renal
Pros
- Great option for cats not yet needing full renal support
- For cats in IRIS stage 1 or early stage 2, or cats over 7 showing signs of ageing
- Can be fed alongside the renal wet range, available in two flavours (chicken and tuna)
Cons
- No specific early renal wet varieties available
- Some cats find the dry formula less appealing than their previous food
- Not made in Australia
Best for: Cats in the early stages of kidney disease or cats over 7 years of age showing signs of ageing
Royal Canin offers both Early Renal and Standard Renal foods (see below) to provide staged nutritional support tailored to the specific progression of Chronic Kidney Disease (CKD) in cats. In the early stages (IRIS Stages 1-2), the Early Renal formula uses moderate phosphorus levels and high-quality protein to slow kidney decline while preserving vital muscle mass and body weight.
What our customers say: "Having changed 14yr old Garfield's diet due to early stage kidney disease I was worried the dry food may have been tasteless for him. I was wrong. He prefers it to the fish flavoured renal wet food (but not to the chicken one, that wet food is top favourite)." - Katrina
Royal Canin Renal
Pros
Cons
- Wet range is thin slices only (no pâté option)
- Some cats find the dry formula less appealing than their previous food
- Not made in Australia
Best for: Cats in IRIS stage 2 and above
As the disease advances (IRIS Stages 2-4), the Standard Renal formula shifts to restricted phosphorus and controlled protein levels, which significantly reduces toxic waste build-up, eases the workload on failing kidneys, and helps manage nausea.
What our customers say: "My 16 ragdoll recently diagnosed with some kidney troubles quite enjoys this over any other kidney brands.. of course he would prefer his old food, but he’s not allowed. So the chicken is his favorite, also the dry food Royal Canin." - Sue
What over-the-counter foods can help cats with early-stage CKD?
If your cat is at IRIS Stage 1 or early Stage 2 and your vet hasn't yet recommended a prescription diet, some senior-formulated foods can be a sensible transitional option. Senior foods are typically lower in phosphorus than standard adult foods and use higher-quality protein - a meaningful step up without requiring a prescription.
See our best senior cat food guide for our top picks.
Important: OTC senior foods are not a substitute for prescription renal diets in confirmed, progressive CKD. The phosphorus restriction in prescription foods is significantly more targeted. If your vet has recommended a renal diet, follow that advice.
What treats can I give a cat with kidney disease?
Most commercial cat treats are a problem for CKD cats. They tend to be high in phosphorus, sodium, and protein, which is the opposite of what compromised kidneys need.
The safest options are:
Their prescription food, used as a treat. Whether your cat is on a wet or dry renal diet, their prescription food is the safest treat option going - it's already formulated to be low in phosphorus and appropriate in protein. You can try the wet or dry renal food from a different brand as a treat. You can also get creative and make your own treats at home using either wet or dry prescription food - Hill's have a handy guide to healthy homemade cat treats.
Plain cooked white chicken breast (no seasoning). White meat is lower in phosphorus than dark meat. A small amount as an occasional treat is generally well-tolerated, but check with your vet first - especially if your cat is at a more advanced stage where protein restriction is tighter.
What to avoid entirely: anything with liver, kidney, heart, fish, dark meat, seafood flavouring, or added salt. These are all high in phosphorus or sodium.
Keep treats to less than 10% of your cat's daily food intake, and always factor them into their overall dietary goals.
What foods and ingredients should I avoid?
High-phosphorus foods: Dark meat (chicken thighs, drumsticks), organ meats (liver, kidney, heart), and most fish are all high in phosphorus.
High-sodium foods: Processed meats, most human food, and many commercial cat treats are high in sodium, which can worsen hypertension, a common CKD complication.
Standard adult cat food: Most regular adult foods have phosphorus levels that are too high for CKD cats from Stage 2 onwards, and protein levels may exceed what's appropriate for compromised kidneys.
How do I transition a fussy cat to a renal diet?
This is one of the most common struggles pet parents face, and it's genuinely hard. Here's what tends to work:
Go slowly. Start with just 10 to 20% new food mixed in with the old, and increase the ratio gradually over two to four weeks.
Warm the food. Gently warming wet food releases the aroma and makes it much more appealing, especially if your cat is feeling off due to nausea (a common CKD symptom).
Try low-sodium broth. A very small amount of low-sodium chicken or fish broth (no onion, no garlic) drizzled over the food can make a big difference for a reluctant cat.
Switch textures. If loaf isn't working, try slices. If the tin isn't landing, try a pouch.
Loop in your vet. If your cat is consistently refusing to eat, speak to your vet about medications that may help.
For more tips, see our fussy cat feeding guide.
For cats with confirmed CKD, prescription renal diets (Hill's k/d, Royal Canin Renal, Purina NF) are the gold standard. Wet food is strongly preferred for hydration - see our tips on increasing your cat's water intake. A slow transition with warmed food and low-sodium broth helps even fussy cats get there. For early-stage cats not yet on a prescription diet, a senior cat food can be a sensible bridge. As always, your vet's recommendation for your cat's specific stage takes priority over any general guidance.
FAQs
References
Ross SJ, Osborne CA, Kirk CA, et al. (2006). Clinical evaluation of dietary modification for treatment of spontaneous chronic kidney disease in cats. Journal of the American Veterinary Medical Association, 229(6), 949-957. https://doi.org/10.2460/javma.229.6.949. Accessed August 2026.
International Renal Interest Society (IRIS). (2023). IRIS Staging of CKD (modified 2023). Retrieved August 2026 from http://www.iris-kidney.com/guidelines/staging.html
Sparkes AH, Caney S, Chalhoub S, et al. (2016). ISFM Consensus Guidelines on the Diagnosis and Management of Feline Chronic Kidney Disease. Journal of Feline Medicine and Surgery, 18(3), 219-239. Accessed August 2026.
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History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Wed 5 Aug 2026
Written by Dr Gillian Hill BVSc (Hons)Dr Gillian Hill BVSc (Hons)
Veterinarian
Dr. Gillian graduated from the University of Sydney in 2005 with a Bachelor of Veterinary Science. She worked in a number of small animal clinics, before joining the Pet Circle Vet team in 2020. Dr. Gillian has special interests in ultrasonography, surgery and behaviour. Her favourite part of being a vet is being an advocate for the animals. She loves helping owners to make the best, evidence-based decisions for their pets, and seeing the beautiful bond that people have with their fur-babies.
