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Royal Canin Feline Veterinary Diets Renal RF 23 Cat Food

  • Dry » 500g Bag £5.99
  • Dry » 2kg Bag £20.50
  • Dry » 4kg Bag £32.50

Selection of 3 products from

£5.99 to £32.50

Royal Canin Renal Feline RF 23 is a complete food for cats with chronic renal insufficiency. It has been specifically formulated to support and maintain healthy renal function, and to reduce oxalate stone formation. It also contains specially selected nutrients which help to support the digestive system. Also available is Renal Special which has been created to provide a more palatable formula due to the inclusion of dehydrated pork protein.

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

Product Kibble Renal RF 23

RENAL FELINE 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


  • Pregnancy
  • Lactation
  • Growth


  • Very low phosphorus - A very 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
  • Antioxidant complex - A patented synergistic complex of antioxidants to help neutralise free radicals
  • Digestive security - Nutrients which support a balanced digestive system



Maize flour, rice, animal fats, wheat gluten*, maize gluten, vegetable fibres, hydrolysed animal proteins, soya protein isolate*, minerals, beet pulp, fish oil, soya oil, fructo-oligo-saccharides.

Nutritional additives (per kg)

Vitamin A: 22000 IU, Vitamin D3: 800 IU, E1 (Iron): 53 mg, E2 (Iodine): 4 mg, E4 (Copper): 9 mg, E5 (Manganese): 69 mg, E6 (Zinc): 227 mg - Preservatives - Antioxidants.

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


Analysis table Amount
Arachidonic acid (%) 0.05
Ash (%) 5.9
Biotin (mg/kg) 3.24
Calcium (%) 0.6
Fibre (%) 4.6
Dietary fibre (%) 10.5
DL-methionine (%) 1.01
EPA/DHA (%) 0.42
Fat (%) 17.0
Linoleic acid (%) 3.15
Lutein (mg/kg) 5.0
Metabolisable energy (calculated according to NRC85) (kcal/kg) 3790.0
Metabolisable energy (measured) (kcal/kg) 4025.0
Methionine Cystine (%) 1.41
Moisture (%) 5.5
Nitrogen-free extract (NFE) (%) 44.0
Omega 3 (%) 0.8
Omega 6 (%) 3.26
Phosphorus (%) 0.3
Protein (%) 23.0
Starch (%) 38.1
Taurine (mg/kg) 2100.0
Vitamin A (UI/kg) 24000.0
Vitamin C (mg/kg) 200.0
Vitamin E (mg/kg) 600.0
Other nutrients Amount
Arginine (%) 1.61
L-lysine (%) 0.95
Minerals Amount
Chloride (%) 0.94
Copper (mg/kg) 15.0
Iodine (mg/kg) 4.1
Iron (mg/kg) 147.0
Magnesium (%) 0.05
Manganese (mg/kg) 82.0
Potassium (%) 0.9
Selenium (mg/kg) 0.1
Sodium (%) 0.3
Zinc (mg/kg) 248.0
Vitamins Amount
Choline (mg/kg) 2300.0
Folic acid (mg/kg) 12.2
Vitamin B1 Thiamin (mg/kg) 14.3
Vitamin B12 Cyanocobalamin (mg/kg) 0.15
Vitamin B2 Riboflavin (mg/kg) 51.3
Vitamin B3 Niacin (mg/kg) 162.5
Vitamin B5 Pantothenic acid (mg/kg) 57.2
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 74 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 94 g 75 g
10 kg 122 g 102 g 81 g

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Questions & Answers for Royal Canin Feline Veterinary Diets Renal RF 23 Cat Food

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Ask Your Own Question

Difference between RF23 & RSF 26?

16th Feb 2014
Susie Poulton
  • VioVet Customer Since: September 2009
  • From: Oxfordshire, United Kingdom

What is the difference between the 2 Renal Dry foods from Royal Canin (RF23 and RSF 26)? The RSF 26 says it is more palatable so is it just for fussier cats, or is it slightly better quality? Or are they for different types of kidney disease? Would there be a medical reason as to why you should feed one and not the other in particular circumstances?
Thanks for your help.

  • Non-Executive Director

The RF 23 is more severely restricted in phosphorus and protein and is more useful for more advanced cases of chronic renal insufficiency. As such it is also less palatable, so the RF 26 is more likely to be accepted by the average cat. They are both used for the same types of problem. If reduced renal function has clearly been demonstrated on blood and urine tests, then the best diet is probably the RF 23. However a lot of these cats are not keen to eat anyway, so giving them a diet which is not particularly palatable is counter productive. It is more important that they eat enough of something rather than not enough of a slightly better food. Having some of both to hand might be best, but aiming to use the RF 23 for preference.