Royal Canin Veterinary Diet Adult Urinary SO Small Breed Dry Dog Food, 8.8-lb bag

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About This Item

Details

  • A veterinary-exclusive dry dog food for small dogs under 22 lb with urinary health concerns.
  • Helps dissolve pure struvite stones and helps prevent calcium oxalate stones.
  • Lowers the risk of crystal formation using RSS methodology for bladder health.
  • Supports urinary health with an exclusive S/O Index, and creates an environment unfavorable to crystal formation in the bladder.
  • Adapted kibble size for small dogs encourages chewing to help reduce tartar buildup.

Ingredient Information

Feeding Instructions

FAQ

Learn More About Royal Canin Veterinary Diet From Our Team of Experts

About Royal Canin Urinary Health for Dogs

Royal Canin, incredible in every detail.  Tailored nutritional solutions for urinary health.

Worried About Your Dog’s Urinary Health?

Your veterinarian is the expert on your dog’s health, so you should always consult with this trusted advisor to find the best urinary health solutions for your pet. Royal Canin works closely with veterinarians to develop dog formulas that support urinary tract and bladder health.

How Can Nutrition Help?

Your veterinarian may recommend a Royal Canin Urinary formula for your dog. These special formulations can:

Dilute Urine

This helps your dog urinate more often, which can help minimize time for stones to form.

Lower RSS

RSS methodology predicts urine crystallization and is used to develop diets that reduce the risk of stone formation.

Maintain Balance

A precise mineral balance can also help prevent stones from forming.

Set Up Autoship for Consistent Delivery

Last-minute dietary changes can sometimes upset your pet’s stomach. Set your Royal Canin pet food order to Autoship to keep feeding on track and avoid unwanted disruptions.

About Royal Canin

What sets Royal Canin apart is their close collaboration with veterinarians. Through these professional partnerships, they strive to learn everything they can about pet health, including how different formulas perform for different breeds, sizes, lifestyles and therapeutic conditions. Ongoing research and development allows Royal Canin to keep providing the precise nutrition dogs need for a range of medical conditions.

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Questions & Answers

15 Customer Questions


Does this have Hydrolyzed Protein?


Is it okay to add water to this dry food? Or will it mess up the pH or whatever?

Answer by Southerngal2Jan 07, 2026
Per my vet, was told to add water. Have been doing so for over a year especially if your fur baby does not drink enough water.

Smallest size bag

Answer by ZozoDec 01, 2025
6 lb

what does the s/p mean at the bottom of the bag?

Answer by ChewySep 28, 2022
The S/P stands for small/petite. This variety is made with an adapted kibble size for small dogs encourages chewing to help reduce tartar buildup.

4.8
Rated 4.8 out of 5 stars
2215 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

89% Positive

Effectiveness

89% Positive

Ingredients

89% Positive

Long-Term Benefits

88% Positive

933 Customer Reviews



Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 5 out of 5 stars
By Gabrielle on Jan 14, 2026

Royal Canin Veterinary Diet from Chewy

There were so many road blocks getting this food for my dog, but CHEWY made it happen with their helpful staff that guided me through the ordering process: from

There were so many road blocks getting this food for my dog, but CHEWY made it happen with their helpful staff that guided me through the ordering process: from downloading the prescription to making sure the order was correct. I am very grateful for your wonderful staff. BTW the food is very good and my pup is non the mend.


Rated 5 out of 5 stars
By karen on Jan 9, 2026

Received prescription food quick

As soon as Chewy received the prescription, the food was shipped. They refunded me for the food. I had just ordered and hadn’t opened and toldme to donate it to

As soon as Chewy received the prescription, the food was shipped. They refunded me for the food. I had just ordered and hadn’t opened and toldme to donate it to a local shelter. That was just going above and beyond to me. I love dealing with people like that! Thank you.


Rated 2 out of 5 stars
By Thomas on Jan 9, 2026

Fedex driver destroyed the box

The bag was ripped open the box. It was in looked like it had been run over by a truck. I had to scrape up half the food off the ground. Horrible. My dog loves the

The bag was ripped open the box. It was in looked like it had been run over by a truck. I had to scrape up half the food off the ground. Horrible. My dog loves the food.I love chewy, but I cannot have deliveries by fedex anymore too much money.Lost


Rated 5 out of 5 stars
By Marissa on Dec 22, 2025

Genuinely works!!!

After a year of taking it since two major surgeries, with little treats here and there, I had more x-rays taken of her abdomen and this food really works! Her gallbladder

After a year of taking it since two major surgeries, with little treats here and there, I had more x-rays taken of her abdomen and this food really works! Her gallbladder had absolutely ZERO stones!!! Ask your vet to prescribe this over any other brand!!


Rated 5 out of 5 stars
By Cheryl on Jan 12, 2026

Java approved!

Java loves the texture and taste! I mix it with the RC Small dog SO formula. She will be having her second bladder surgery Feb. 4 to get rid of those pesky st

Java loves the texture and taste! I mix it with the RC Small dog SO formula. She will be having her second bladder surgery Feb. 4 to get rid of those pesky struvites.


Rated 5 out of 5 stars
By Michael on Jan 21, 2026

Always there when we need it

We foster and take in Older Dogs, most of whom have medical issues. Chewy makes sure we have the right stuff for all of them

We foster and take in Older Dogs, most of whom have medical issues. Chewy makes sure we have the right stuff for all of them


Rated 5 out of 5 stars
By DEBORAH on Dec 27, 2025

Royal Canin Urinary Dry Diet

Our vet. recommended the royal canin urinary diet for our small mixed breed. He uses this dry food, the RC wet food, and also the RC treats.

Our vet. recommended the royal canin urinary diet for our small mixed breed. He uses this dry food, the RC wet food, and also the RC treats.


Rated 5 out of 5 stars
By Genny on Oct 19, 2025

Dogs love it!

My dog loves it so much! After a very expensive surgery for urinary stones we had to change Lily’s diet. Since she is used to so much variety I thought my puggy

My dog loves it so much! After a very expensive surgery for urinary stones we had to change Lily’s diet. Since she is used to so much variety I thought my puggy would have a hard time adjusting to her new diet. Now she enjoys her feeding times even more. I mix in the wet food for urinary once a day. The small kibble is also a plus!


Rated 5 out of 5 stars
By Ann on Dec 23, 2025

Outstanding service

Chewy has been excellent in caring for my pets needs. She has sense then passed away and chewy refunded our last shipment. Great service

Chewy has been excellent in caring for my pets needs. She has sense then passed away and chewy refunded our last shipment. Great service


Rated 5 out of 5 stars
By Margery on Jan 15, 2026

He delivered to the front door

My girls who are 14 & 6 have been on this food all their lives. They love it and are healthier for it.

My girls who are 14 & 6 have been on this food all their lives. They love it and are healthier for it.