Royal Canin Veterinary Diet Renal Support S is an antioxidant-enriched dry kibble formulated to support kidney health and stimulate appetite in dogs with kidney concerns, and its 4.7 star average across 405 reviews makes it one of the more established renal diets in this lineup.
Dogs under veterinary care for kidney health who need a prescription renal diet with a track record of hundreds of reviews.
Skip if
Your dog has not been diagnosed with a kidney condition, since this is a prescription-required formula targeted at a specific medical need.
Form Dry
Flavor Chicken
Benefits Supports Kidney Health And Stimulates Appetite In Dogs With Kidney Issues.
Best for Stomach
Breed size All
Weight 6 Pounds
Priced 48% below the category median ($81.99 across 50 tracked models)
Our scorecard
4.6/5overall
Owner rating4.7/5
4.7 average across 405 owner ratings
Popularity3.1/5
405 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog food and health supplements we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
['This 6 lb bag of Royal Canin Veterinary Diet Renal Support S is a prescription dry kibble built to support kidney health, with antioxidants included in the formula and a yam-free ingredient profile. Royal Canin lists appetite stimulation as one of the goals alongside general kidney support.', "The listed recommended uses cover kidney health support, appetite stimulation, and promoting kidney function overall, which suggests this formula is meant for ongoing management rather than a one-time fix. It requires a prescription, so it's meant to be used as part of a plan set by your vet.", "At $42.99 for 6 lb, it's priced the same as its Renal Support F counterpart. With 405 reviews and a 4.7 star average, it has a considerably larger review base than the F variant, giving it a more established track record."]
Pros
Antioxidant-enriched formula aimed at kidney health support
Solid 4.7 star average across 405 reviews
Yam-free ingredient profile
Also formulated to help stimulate appetite
Cons
Prescription required, so it needs a vet's direction to use
6 lb bag size means frequent reorders
Recent purchase volume in the latest tracking period was minimal
Specifications
Form
Dry
Flavor
Chicken
Benefits
Supports Kidney Health And Stimulates Appetite In Dogs With Kidney Issues.
Best for
Stomach
Breed size
All
Weight
6 Pounds
Performance notes
The S variant in Royal Canin's Renal Support line is formulated with antioxidants and a yam-free recipe, aimed at supporting kidney function while also encouraging dogs to keep eating, which matters since appetite loss is common in dogs managing kidney disease.
What buyers say
A 4.7 star average across 405 reviews points to a well-established, generally well-liked formula, even though the most recent monthly purchase count on record was minimal, which may reflect normal fluctuation in a smaller prescription category.
What does the antioxidant content in this formula do?
Royal Canin includes antioxidants in this renal support recipe as part of its broader approach to supporting kidney health, though specific health outcomes should be discussed with your vet.
How is Renal Support S different from Renal Support F?
Both are prescription renal diets from Royal Canin aimed at kidney health and appetite support. The exact differences between the S and F formulas come down to palatability and energy density, so ask your vet which fits your dog's needs.
Is a yam-free recipe important for kidney health?
Royal Canin lists this formula as yam free as part of its ingredient profile, but whether that detail matters for your dog depends on their individual health picture, which is best discussed with your vet.
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