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Royal Canin Feline Veterinary Diets Renal Special RSF 26 Cat Food

  • Dry » 500g Bag £5.50
  • Dry » 2kg Bag £20.50
  • Dry » 4kg Bag £33.49

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£5.50 to £33.49

Royal Canin's Renal Special (RSF 26) is a complete food for cats that suffer with chronic renal insufficiency. It has been formulated to maintain and support healthy renal function and reduce the formulation of oxalate stones.

The Renal Special recipe provides a new texture, taste and aroma to the original dry Renal diet, to help keep your cat from losing interest in their food.

The very low phosphorus content prevents retention which can lead to secondary hyperparathyroidism and renal failure. The food contains a synergistic antioxidant complex which will help boost your cat's natural defences, maintain healthy cells and DNA, and neutralise free radicals.

Omega 3 long chain fatty acids help support a lower glomerular pressure which will help to prevent GFR. Additionally, an increase in uraemia often causes the development of gastric or intestinal mucosal ulcers. This will be prevented with added FOS and zeolite.

 Royal Canin veterinary dients should only be given in conjunction with your vets recommendation!

Product Kibble RSF 26

RENAL SPECIAL is a complete dietetic feed for cats formulated:

  • to support renal function in the case of chronic or temporary renal insufficiency, through its low level of phosphorus and high quality protein
  • to reduce oxalate stone formation, through its low level of calcium and vitamin D, and its urine alkalising properties


  • Chronic renal insufficiency (CRI)
  • Management of calcium oxalate urolith recurrence in cats with impaired renal function
  • Prevention of recurrence of urolithiasis requiring urine alkalinisation urate and cystine uroliths


  • Pregnancy
  • Lactation
  • Growth


  • Enhanced Palatability - Enhanced palatability helps stimulate feeding in cats with renal insufficiency
  • Low Phosphorus - A low phosphorus intake is key to help support renal function in cats with chronic renal insufficiency
  • Vascular Support - Nutrients that help support good renal filtration
  • Digestive Security - Nutrients which support a balanced digestive system



Maize flour, rice, dehydrated pork protein*, animal fats, maize gluten, vegetable fibres, hydrolysed animal proteins, wheat gluten*, minerals, beet pulp, fish oil, soya oil, fructo-oligo-saccharides, marigold extract (source of lutein).

Nutritional additives (per kg)

Vitamin A: 22000 IU, Vitamin D3: 800 IU, E1 (Iron): 49 mg, E2 (Iodine): 3.8 mg, E4 (Copper): 11 mg, E5 (Manganese): 64 mg, E6 (Zinc): 212 mg, E8 (Selenium): 0.07 mg - Preservatives - Antioxidants.

*L.I.P.: protein selected for its very high assimilation.


Analysis table Amount
Arachidonic acid (%) 0.05
Ash (%) 6.1
Biotin (mg/kg) 3.24
Calcium (%) 0.6
Fibre (%) 5.0
Dietary fibre (%) 10.2
DL-methionine (%) 1.12
EPA/DHA (%) 0.42
Fat (%) 17.0
Linoleic acid (%) 3.05
Lutein (mg/kg) 5.0
Metabolisable energy (calculated according to NRC85) (kcal/kg) 3769.0
Metabolisable energy (measured) (kcal/kg) 3998.0
Methionine Cystine (%) 1.41
Moisture (%) 5.5
Nitrogen-free extract (NFE) (%) 40.4
Omega 3 (%) 0.79
Omega 6 (%) 3.21
Phosphorus (%) 0.44
Protein (%) 26.0
Starch (%) 35.2
Taurine (mg/kg) 2100.0
Vitamin A (UI/kg) 25000.0
Vitamin C (mg/kg) 200.0
Vitamin E (mg/kg) 600.0
Other nutrients Amount
Arginine (%) 1.69
L-lysine (%) 0.95
Minerals Amount
Chloride (%) 0.65
Copper (mg/kg) 15.0
Iodine (mg/kg) 3.8
Iron (mg/kg) 175.0
Magnesium (%) 0.06
Manganese (mg/kg) 76.0
Potassium (%) 0.9
Selenium (mg/kg) 0.07
Sodium (%) 0.3
Zinc (mg/kg) 241.0
Vitamins Amount
Choline (mg/kg) 2300.0
Folic acid (mg/kg) 12.2
Vitamin B1 Thiamin (mg/kg) 14.2
Vitamin B12 Cyanocobalamin (mg/kg) 0.15
Vitamin B2 Riboflavin (mg/kg) 51.3
Vitamin B3 Niacin (mg/kg) 162.3
Vitamin B5 Pantothenic acid (mg/kg) 57.1
Vitamin B6 Pyridoxine (mg/kg) 42.5
Vitamin D3 (UI/kg) 800.0

Feeding guidelines

The following table shows the recommended feeding amount in grams per day. Ensure a supply of fresh drinking water is available at all times.

Cat's weight Lean Normal Overweight
2 kg 39 g 32 g -
3 kg 52 g 43 g -
4 kg 64 g 53 g 42 g
5 kg 75 g 62 g 50 g
6 kg 85 g 71 g 57 g
7 kg 95 g 79 g 63 g
8 kg 104 g 87 g 69 g
9 kg 113 g 95 g 76 g
10 kg 122 g 102 g 81 g

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Royal canning and ipikatine

28th Oct 2015
Janice Lancaster
  • VioVet Customer Since: January 2015
  • From: West Yorkshire, United Kingdom

Do I need to put phosphate binder on royal canning renal special? Also is it OK to syringe feed the kibbles after soaking.Thank you

  • Brand Manager

Hi Janice, it would be perfectly okay to soak the kibbles and syringe feed if your cat is having difficulty eating. There is also a wet variety available here which, if your cat is able to eat wet foods, might be an easier option for you.

The diets have been developed to be low in phosphorous, but providing additional support with Ipakitine would not not be a bad idea, as it also has the ability to bind uraemic toxins and block their absorption. It would work with the diet to greatly reduce the strain on the kidneys, and help to prevent phosphorous and toxin build-up.