Helps stimulate appetite in cats and encourage eating with aromatic kibble

Helps reduce the risk of skin and GI reactions with proteins that are broken down to a size that’s less likely to be recognized by the immune system

Helps compensate for decreased appetite with a highly palatable energy-dense formula to reduce meal volume

Helps promote kidney function with a precise antioxidant complex, fatty acids from fish oil, low phosphorus, and targeted protein levels

Your vet recommended Royal Canin Renal Support + Hydrolyzed Protein for a reason. This highly palatable dry cat food is specially formulated to care for the kidney health of adult cats under veterinary supervision. The aromatic dry kibble stimulates your cat’s appetite and encourages eating. Hydrolyzed proteins, composed of low-molecular-weight peptides, help minimize the risk of a reaction due to a food sensitivity while also helping support kidney health. And the energy-dense diets provide nutritional support in smaller portions, since cats with reduced kidney function have decreased appetites. Plus, they contain a precise antioxidant complex, fatty acids from fish oil, low phosphorus, and targeted protein levels to help support kidney function.

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Discover our tool that calculates the daily portion for your pet. Fill in your pet's information and you will get their daily feeding recommendation. In case of weight issues, do not hesitate to consult your vet to adapt this portion. Note that this feeding recommendation is more precise than the feeding table, therefore the values may slightly differ.


Brewers rice, hydrolyzed soy protein, chicken fat, dried chicory root, natural flavors, powdered cellulose, vegetable oil, fish oil, calcium carbonate, potassium chloride, fructooligosaccharides, sodium pyrophosphate, calcium sulfate, sodium silico aluminate, DL-methionine, choline chloride, taurine, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, L-ascorbyl-2-polyphosphate (source of vitamin C), D-calcium pantothenate, biotin, pyridoxine hydrochloride (vitamin B6), riboflavin supplement, thiamine mononitrate (vitamin B1), vitamin A acetate, vitamin B12 supplement, folic acid], trace minerals [zinc proteinate, zinc oxide, manganese proteinate, manganous oxide, copper sulfate, ferrous sulfate, sodium selenite, copper proteinate, calcium iodate], GLA safflower oil, marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3982 kilocalories of metabolizable energy (ME) per kilogram or 402 kilocalories ME per cup on an as fed basis (calculated).

Nutrient Amount
Crude Protein (min)24.0%
Crude Protein (max)28.0%
Crude Fat (min)18.0%
Crude Fiber (max)5.4%
Moisture (max)8.0%
Eicosapentaenoic + Docosahexaenoic acid (EPA + DHA) (min)0.24%
Phosphorus (max)0.57%
Vitamin E (min)420 IU/kg
Ascorbic acid* (min)160 mg/kg.

*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profiles.

Poids Normal Lean
4.4 lb (2 kg) 1/4 cup (31 g) 3/8 cup (37 g)
5.5 lb (2.5 kg) 3/8 cup (36 g) 3/8 cup (43 g)
6.6 lb (3 kg) 3/8 cup (41 g) 1/2 cup (49 g)
7.7 lb (3.5 kg) 1/2 cup (46 g) 1/2 cup (55 g)
8.8 lb (4 kg) 1/2 cup (50 g) 5/8 cup (60 g)
9.9 lb (4.5 kg) 1/2 cup (55 g) 5/8 cup (66 g)
11 lb (5 kg) 5/8 cup (59 g) 3/4 cup (71 g)
12 lb (5.5 kg) 5/8 cup (63 g) 3/4 cup (76 g)
13 lb (6 kg) 5/8 cup (67 g) 3/4 cup (81 g)
14 lb (6.5 kg) 3/4 cup (71 g) 7/8 cup (85 g)
15 lb (7 kg) 3/4 cup (75 g) 7/8 cup (90 g)
17 lb (7.5 kg) 3/4 cup (79 g) 7/8 cup (94 g)
18 lb (8 kg) 7/8 cup (82 g) 1 cup (99 g)
19 lb (8.5 kg) 7/8 cup (86 g) 1 cup (103 g)
Multifunction Renal Support + Hydrolyzed Protein Dry Cat Food (Packaging May Vary)

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Customer reviews

18 Nov 2022

Awesome for my kitty with IBD

We have a kitty who has had diarrhea for years. We tried different sensitive stomach diets, probiotics, and daily antibiotics. The only thing that worked was daily antibiotics, which were a nightmare to administer and made it hard to go on vacation. Then he developed kidney issues and lost a bunch of weight, so our vet had a consult with Royal Canin about what might help given his various issues. They recommended this food. Within a day he was having the most normal poops he's ever had. He has gained his weight back and loves eating this food. I don't exaggerate when I say I got teary eyed when I realized we had a solution to health issues that have been making all of us miserable for years. My only beef is that it's worrisome when it's out of stock or on backorder, because there's no alternative for cats who eat this food. I hope the company is prioritizing production for special formulations like this.
25 Oct 2022

Grateful for this diet

First, thank you for making this diet. Not sure where we would be without it. My cat has been on it for two years and it’s probably helped save her life. However, the consistency was way off on this last bag. There are a lot of very large pieces that look like multiple kibbles were extruded together and not separated. After two years of consistent kibbles I am wondering what’s up? Cats are pretty picky about shape and cats with renal and IBD even more so. This food isn’t cheap so if 10% of the kibbles are deformed like this and rejected by the cat it adds up. Still giving it 5 stars because it’s keeping her alive and she eats it well most of the time.
21 Jul 2022

Different Formula Between Batches?

My cat has been on this for years and it has been fine. Last two weeks she refused to eat it. After trying a number of different things to get her to eat, I tried opening another bag for her and the two bags are completely different in color and shape. This new bag is a lighter shade of orange/yellow and smaller kibble. As soon as she got into this new bag she began eating again. I'm not sure what is going on with the consistency of the formula, but since this is the only food of its kind it is concerning if it's not always the same. Overall it has help her immensely, but it's expensive and difficult to find.
22 Jun 2022

Cat Hates New Formula

I wholeheartedly agree with Csmith. My cat used to love this cat food and it took forever for us to find something she would eat. We would buy several bags at a time since it was so hard to find. Now that we opened a bag of the reformulated food she HATES it and doesn’t want to eat. Bring back the old formula.
03 Mar 2022

Helps with his GI issues and Renal Support!

We were on the moderate calorie go support diet due to some tummy troubles. When Oliver was diagnosed with pre-renal issues, I was beside myself. I started doing all the research and wanted a food to support his GI issues (he was throwing up all the time), as well as start an early support for the renal concerns. Since switching he's been an even more healthy cat. I've never been happier with a pet food before.
30 Jan 2022

Formula change

Why did you have to change the formula? My cat hates it now. It’s so hard to find product like this and then for her to also like it so she doesn’t waste away and starve herself? Even harder. And then you cheap out and change formulas. And a while ago there were tons of reviews like mine that appear to be gone? Change back the formula!
14 Jan 2022

My 16-year old cat loves it

My cat has renal issues and this is the only food that keeps him well. All other foods make him vomit constantly. I would have rated it a 4 but the constant supply issue is a huge problem. You would think that Royal Canin will care but apparently, they don't since this shortage has been going on for quite a while. It's time for Royal Canin to get their production issues under control. Some retailers are bumping the price up to 150% more which is unacceptable. At the end, the cat pays the price.
Royal Canin response
Thank you for the feedback
30 Dec 2021

Cat won't eat this food

My cat won't eat this food, either soaked in spring water overnight or dry (which I hate to give her because she doesn't drink water on her own). The other foods for CKD contain chicken and other proteins which my cat cannot eat. What am I supposed to feed her?
12 Oct 2021

The only product of it's kind. Under supplied.

This is great product, and the only product of it's kind in the market. However, it is basically never available. This monopoly and lack of supply, with steady demand, allows for truly insane levels of price gouging (as shown in the images below). And if you can't pay, your sick cat suffers. It's a 2 star overall experience.
12 Jul 2021

Only Food My CKD Cat Will Eat Constantly

My 9 year old boy has Stage 4 CKD and was already eating the hydrolyzed protein product because of his sisters IBD. Anyway, after numerous attempts at renal foods this is the only one he took to and loves. He eats it every day and prefers it over every single wet food I could offer him. I do wish this version had a wet food option as that would be better for him and his sister but I am just happy he is eating. Thank you for making this product. I do wish it was available in more locations.