Formulated with low phosphorus and restricted protein of high quality to support renal function, helping to improve the cat’s quality of life.

Adapted energy content to reduce meal volume and help compensate for a decreased appetite.

A specific aromatic profile with a dedicated kibble shape to help stimulate the cat’s appetite, particularly in cases prone to food aversion.

Concentrated energy

Royal Canin Veterinary Diet Renal Support S is a veterinary-exclusive dry cat food for adult cats to support kidney health

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Labrador Retriever adult sitting with its owner outdoors

Corn, chicken fat, pork digest, brewers rice, corn gluten meal, pea fiber, fish meal, natural flavors, dried chicory root, wheat gluten, fish oil, calcium carbonate, vegetable oil, sodium silico aluminate, potassium chloride, powdered psyllium seed husk, potassium citrate, salt, DL-methionine, sodium pyrophosphate, L-arginine, fructooligosaccharides, choline chloride, taurine, vitamins [DL-alpha tocopherol acetate (source of vitamin E), L-ascorbyl-2-polyphosphate (source of vitamin C), biotin, niacin supplement, D-calcium pantothenate, riboflavin supplement, pyridoxine hydrochloride (vitamin B6), vitamin A acetate, thiamine mononitrate (vitamin B1), folic acid, vitamin B12 supplement, vitamin D3 supplement], trace minerals [zinc proteinate, zinc oxide, ferrous sulfate, manganese proteinate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], magnesium oxide, marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 4054 kilocalories of metabolizable energy (ME) per kilogram or 397 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)22.5%
Crude Protein (max)26.5%
Crude Fat (min)19.5%
Crude Fiber (max)5.0%
Moisture (max)8.0%
Eicosapentaenoic + Docosahexaenoic acid (EPA + DHA) (min)0.25%
Phosphorus (max)0.57%
Vitamin E (min)355 IU/kg
Ascorbic acid* (min)170 mg/kg.

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

Dry Feeding

Weight Normal Lean
4.4 lb (2 kg) 1/4 cup (30 g) 3/8 cup (36 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 (40 g) 1/2 cup (48 g)
7.7 lb (3.5 kg) 1/2 cup (45 g) 1/2 cup (54 g)
8.8 lb (4 kg) 1/2 cup (50 g) 5/8 cup (59 g)
9.9 lb (4.5 kg) 1/2 cup (54 g) 5/8 cup (65 g)
11 lb (5 kg) 5/8 cup (58 g) 3/4 cup (70 g)
12 lb (5.5 kg) 5/8 cup (62 g) 3/4 cup (75 g)
13 lb (6 kg) 5/8 cup (66 g) 3/4 cup (79 g)
14 lb (6.5 kg) 3/4 cup (70 g) 7/8 cup (84 g)
15 lb (7 kg) 3/4 cup (74 g) 7/8 cup (89 g)
17 lb (7.5 kg) 3/4 cup (78 g) 1 cup (93 g)
18 lb (8 kg) 7/8 cup (81 g) 1 cup (97 g)
19 lb (8.5 kg) 7/8 cup (85 g) 1 cup (102 g)

Mixed Feeding with Renal E Wet

Weight Can + Normal Lean
4.4 lb (2 kg) 1/2 can + 1/8 cup (11 g) 1/8 cup (17 g)
5.5 lb (2.5 kg) 1/2 can + 1/8 cup (16 g) 1/4 cup (23 g)
6.6 lb (3 kg) 1/2 can + 1/4 cup (21 g) 1/4 cup (29 g)
7.7 lb (3.5 kg) 1/2 can + 1/4 cup (26 g) 3/8 cup (35 g)
8.8 lb (4 kg) 1/2 can + 1/4 cup (30 g) 3/8 cup (40 g)
9.9 lb (4.5 kg) 1/2 can + 3/8 cup (35 g) 1/2 cup (45 g)
11 lb (5 kg) 1/2 can + 3/8 cup (39 g) 1/2 cup (50 g)
12 lb (5.5 kg) 1/2 can + 3/8 cup (43 g) 1/2 cup (55 g)
13 lb (6 kg) 1/2 can + 1/2 cup (47 g) 5/8 cup (60 g)
14 lb (6.5 kg) 1/2 can + 1/2 cup (51 g) 5/8 cup (65 g)
15 lb (7 kg) 1/2 can + 1/2 cup (54 g) 3/4 cup (69 g)
17 lb (7.5 kg) 1/2 can + 5/8 cup (58 g) 3/4 cup (74 g)
18 lb (8 kg) 1/2 can + 5/8 cup (62 g) 3/4 cup (78 g)
19 lb (8.5 kg) 1/2 can + 5/8 cup (65 g) 7/8 cup (82 g)
Royal Canin Veterinary Diet Feline Renal Support S Dry Cat Food

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Customer reviews

Mia22
23 Oct 2019

The only kidney food my cat will eat!

[This review was collected as part of a promotion.] Tried 2 other brands and my cat would not eat them. This is the only kidney fiid he (Gatsby) will eat. Diagnised 1 year ago and all kiney levels normal. Gatsby is hapot , energetuc and all systems go. THANK YOU Royal Canin.
Kendel
23 Oct 2019

Cat loves it

[This review was collected as part of a promotion.] My cat has been on this for about a month now and she loves it. Of course my big girl is not picky which is why she has to be on prescription food.
Tinkjing
23 Oct 2019

Cat Weight Watcher!

[This review was collected as part of a promotion.] My cat been prescribe and eating this for years and it controls her weight. Jasmine is 16 years old and looking good!
Melvin
22 Oct 2019

Keeping my 20 year old baby alive

[This review was collected as part of a promotion.] The Vet put her on this 2years ago and she is still alive
crzecatlayde
22 Oct 2019

Highly recommend

[This review was collected as part of a promotion.] We've been using the Feline Renal Support "S" for a few years. Our 16 year old cat was initially diagnosed with stage 2 renal failure. Since switching her food, her kidney function has improved. She is usually a very picky eater and she loves this food.
Kmarsh1013
27 Jun 2019

My Kitty Loves It

My cat loves this diet and just by making the switch has already improved her kidney functions.
Floridapaul
22 Apr 2019

20 year old cat loves it!

We got the sample pack from the vet and she went for the S dry food immediately! Her coat looks great and she is more active, as well. Hoping this gives her another few years with us! Our other cat loves the food too.
barbaraW
27 Jan 2019

Seeing improvement already

I was given a sample kit from my Vet and set out all the dry choices in different locations in the house. I switched out the locations so I knew that wasn't a factor. My 15 year old kitty chose Renal Support S dry food. The bag ran out while I still have the other dry samples left. I had to wait for the Vet to order a real bag and was afraid she'd forget she liked it. Not so, she is now on RS S and we are both happy.
Jenny Z
23 Nov 2018

Cat has been enjoying and eats regularly!

My cat has been on S for nine months now and still eats regularly. When he was first diagnosed I didn't know how my cat would respond. So happy that this food is liked - my cat eats better on this food than on the non-prescription premium foods.
PookiesPrincess
31 Oct 2018

cat liked it, all that matters

[This review was collected as part of a promotion.] My cat liked it so that is all that matters. It is super difficult to get our cat to eat different food and especially when they are not feeling well. So if they actually eat a new diet, I am thrilled.