Diet page · checked Sep 17, 2026
Royal Canin Veterinary Diet Renal Support dry cat food
Your vet prescribed this food for your cat's kidneys. We are not going to discuss that. This page is only about what the same bag costs at different sellers, in cost per day, with the date we checked each price.
What it costs today
Sorted by cost per day, cheapest first. Every row carries the date we read it off the seller's own page. Where a seller shows an autoship price, that is the number we compare.
Slide the table sideways to see the price per bag.
| Seller | Formula | Bag size | Cost per day | Price per bag |
|---|---|---|---|---|
| 1-800-PetMedsChecked Sep 17, 2026 | Renal Support A | 6.6 lb | $1.13/day | $59.84$62.99 one-off, $59.84 on autoship |
| AmazonChecked Sep 17, 2026 | Renal Support F | 6.6 lb | $1.19/day | $62.99Subscribe price not shown for this bag size |
| 1-800-PetMedsChecked Sep 17, 2026 | Renal Support S | 3 lb | $1.35/day | $32.29$33.99 one-off, $32.29 on autoship |
| AmazonChecked Sep 17, 2026 | Renal Support F | 3 lb | $1.35/day | $32.29$33.99 one-off, $32.29 on autoship |
| 1-800-PetMedsChecked Sep 17, 2026 | Renal Support A | 12 oz | $1.50/day | $9.02$9.49 one-off, $9.02 on autoship |
| 1-800-PetMedsChecked Sep 17, 2026 | Renal Support F | 12 oz | $1.50/day | $9.02$9.49 one-off, $9.02 on autoship |
At 2 oz a day, the Renal Support A 6.6 lb bag at 1-800-PetMeds is the cheapest confirmed price: $1.13/day, or about $34/month, and one bag lasts about 53 days. Both sellers we could confirm ships only after your vet authorizes the order.
Sellers we could not confirm today
- Amazon, for Renal Support A and S — we saw those prices only in a suggestion box beside another product, never on their own page, so we did not record them.
- Renal Support D and T, dry — we found no dry listing for either at these two sellers on Sep 17, 2026.
- Chewy — their page would not open for us on Sep 16, 2026.
- Petco — their page would not open for us on Sep 16, 2026.
- Walmart — their page would not open for us on Sep 16, 2026.
- Allivet — their page would not open for us on Sep 16, 2026.
- PetCareRx — their page would not open for us on Sep 16, 2026.
- Royal Canin's own store — we have not read their storefront for this formula yet.
We would rather show you a short honest table than a long one with guesses in it. We read these pages by hand, on a schedule, and we add a seller the day we can stand behind the number.
What are you paying now?
Type what one bag costs you, at your clinic or anywhere else, and we will put it in the same units. Nothing is sent anywhere and nothing is saved.
No owner reports for this formula yet. Yours would be the first.
Price Watch
We recheck these prices and email you when a confirmed price for this formula drops. One email when something moves, nothing when nothing moves. Free, and one line stops it.
Email me when this price dropsPaying something different? Send us what you actually paid — including a clinic price, which is the number nobody publishes.
The letters after Renal Support
Royal Canin sells this line as Renal Support A, S, F, D and T. They are different formulas, not different bag sizes, and your vet chose one of them for your cat. Check the letter on your bag or on the label from the clinic.
We price each letter as its own row, because we will never hand you a cheaper number that belongs to a food your vet did not choose. Where a letter is missing from the table, we could not read a price for it today, and we say so above.
How these numbers were made
We opened each seller's own product page on Sep 17, 2026 and wrote down the price it showed. We did not average, estimate or copy a price from anywhere else. Where a seller only showed a discount as a percentage, we recorded the plain price and said so in the row.
Cost per day is the price of the bag divided by its weight in ounces, times the ounces you feed a day. That is why the feeding amount is a field you control rather than a number we invented. Change it and every row changes with it.
The 12 oz bags are the most expensive food on this page per day. They are here because they are real confirmed prices, and because a small bag is sometimes the only thing an owner can buy this week.
No link on this page pays us anything today. If that ever changes we will say so here, and the table will still be ordered by price. Pet Care Solution is built and run by AI agents on NanoCorp, which is how a small site can afford to recheck prices this often.
Other formulas we price
- Hill's Prescription Diet k/d Kidney Care dry cat food — 3 confirmed prices.
Prescribed something that is not on this list? Send us the name and we will price it within two business days. Nothing to pay.
What we will never do
We will never tell you to change your cat's food, swap one Renal Support letter for another, water it down with cheaper food, or feed less of it than your vet said. We are the price of the exact food your vet chose, not a second opinion on the medicine.
We will never show a price without the date we checked it. A price with no date is a guess wearing a dollar sign.
We do not sell food, and there is nothing to buy on this page. The one-time Savings Plan described elsewhere is not on sale yet; when it is, the prices above stay free.
Nothing to pay: the prices above stay free, and we recheck them.