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Royal Canin Feline Veterinary Diets Renal Special RSF 26 Cat Food

Royal Canin Feline Veterinary Diets Renal Special RSF 26 Cat Food
Dry » 500g Bag

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  • Dry » 500g Bag £6.49
  • Dry » 2kg Bag £22.49
  • Dry » 4kg Bag £35.99

Selection of 3 products from

£6.49 to £35.99


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

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. To find the exact cost of shipping your item, and to see all options available, follow these steps:

  1. Put the items you wish to order in your basket
  2. Proceed to checkout and enter your delivery address, including country
  3. Delivery information including price will automatically update to what is available to you

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as non-ambient items and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.

Reviews (19)

Q & A

Below are some recent questions we've received regarding Royal Canin Feline Veterinary Diets Renal Special RSF 26 Cat Food, including answers from our team.

3 October 2018 at 11:35am

Different names?


What is the difference between the RF, RS and RSF brands of cat food?

  • Customer Service Advisor


Thank you for getting in touch.

I have had a response from Royal Canin regarding your question.

They said:

We have three Renal dry diets available; Renal (RF23), Renal Special (RSF26) and Renal Select (RSE24). We know that cats with renal disease often go off their food so we have developed a range of foods with different flavours, textures and aromas that all provide the same level of support for your cat.

Renal Special and Renal Select contain pork as the protein source, whereas we use vegetable protein as the main protein source in the Renal diet. Pork has a low mineral content which helps to enhance the palatability and also increase the digestibility. Both the Renal Special and Renal Select have a slightly higher protein content than the Renal diet, but this is still fine for cats with renal disease, as we use a highly digestible protein. The higher protein also helps to enhance the palatability of the food. The Renal Select has a double texture, pillow kibble which is designed to make the kibble more palatable.

All three of the diets are formulated to support renal function in cases of chronic kidney disease and have an adapted content of high quality protein which helps reduce the kidney's workload. They contain EPA and DHA, a complex of antioxidants and a low phosphorus level.

Hope this helps,


28 October 2015 at 1:00am

Royal canning and ipikatine

Janice Lancaster

  • VioVet customer since 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.