Royal Canin Veterinary Diet Adult Urinary SO Moderate Calorie Dry Cat Food

By Royal Canin Veterinary Diet
Rated 4.6884 out of 5 stars
Veterinary Diet Item


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$54.99Chewy Price
$52.24Autoship Price
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About This Item


  • A veterinary-exclusive dry cat food for cats prone to weight gain with urinary health concerns.
  • Helps dissolve pure struvite stones and helps prevent calcium oxalate stones.
  • Moderate calorie content for ideal weight maintenance.
  • 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.

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Nutritional Information

Feeding Instructions


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

About Royal Canin Urinary Health for Cats

Worried About Your Cat’s Urinary Health?

Your veterinarian is the expert on your cat’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 cat formulas that help support urinary tract and bladder health.

How Can Nutrition Help?

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

Dilute Urine

This helps your cat 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 cats need for a range of medical conditions.

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Top IngredientsChicken By-Product Meal, Brewers Rice, Corn...Chicken By-Product Meal, Brewers Rice, Corn...Chicken By-Product Meal, Chicken Fat, Brown Rice...Chicken By-Product Meal, Powdered Cellulose, Tapioca...New: Corn, Brewers Rice, Wheat Gluten...
Special DietVeterinary Diet, Pea-Free, With GrainVeterinary Diet, Pea-Free, With GrainSensitive Digestion, Veterinary Diet, Pea-Free, With GrainVeterinary Diet, Weight Control, Pea-Free, With GrainVeterinary Diet, Pea-Free, With Grain
Food FlavorPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, ChickenPoultry, Chicken
Health FeatureUrinary Tract Health, Weight ManagementUrinary Tract HealthDigestive Health, High-EnergyWeight ManagementHip & Joint Support, Senior Care
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Questions & Answers

34 Customer Questions

What is the % ash content ?

Can another cat (without special diet) eat this?
Answer by ChewyJan 25, 2018
Since this is a prescription food formulated to meet specific diet restrictions from known health issues, this food should not be fed to any other animal than the one prescribed due to the restriction of specific nutrients. Prescription diets can be detrimental to an otherwise healthy pet if that pet doesn't have the ailment for which the food is designed.

My 2 cats have been eating the regular Royal Canin urinary cat food for several years now, they love it but at least every other day they throw it up. Will switching to this food help with that? Thank you!
Answer by ChewyOct 25, 2017
We encourage pet parents to consult with a veterinarian to make sure this is the best fit for your pet and their current treatment plan.

How many cups are in the 6.6 lb bag?
Answer by ChewyJan 15, 2019
The 3.3-pound bag has about 13 cups of food, the 6.6-pound bag has about 26 cups of food, and there are about 70 cups of food in a 17.6-pound bag.

ReviewsWrite a Review

Rated 4.6884 out of 5 stars
1056 Ratings
Would recommend to a friend

1053 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 Ed1 on Sep 19, 2023

Edgar Approved. Happy Cat Mom.

I adopted two kittens in June 2022, I noticed one was developing problems with urination at around 6 months of age. Edgar was urinating everywhere, and frequently. He didn't seem like he was in pain, but I noticed drops of blood in his urine. So Edgar went to the Veterinarian and had a clean urinalysis. So no UTI, but the Vet stated he has a metabolic disorder that causes him to be prone to bladder stones and a diet change was in order. We started him on the Royal Canin Veterinary Diet Adult Urinary SO kibble and Edgar loves it. In fact it is so yummy, that the other three cats try to steal a bite every chance they get! So Edgar now has a private dining area. He is now 18 months old and thriving. Bright beautiful green eyes, silky coat, healthy skin and growing in leaps and bounds. He is very active and is generally a happy and healthy guy now. This Cat Mom recommends Royal Canin food without hesitation.

Rated 5 out of 5 stars
By KM on Sep 18, 2023

The only cure for my FIC cat

My cat was diagnosed with FIC (feline idiopathic cystitis) early this year. It was so frustrating that multiple vets could not give us an answer to what was wrong. One of the vets suggested a special diet catered to cats with urinary problems. We tried one with no luck, then switched to this brand. She went from 2 outbreaks a month (consistently peeing blood, cringing in pain, peeing all over our apartment) to all of her symptoms completely halting in 2 weeks. This combined with a daily scoop of D Mannose has been what works for her. If your kitty is struggling with FIC, I’m sorry. I hope that this works for you like it did for my baby!

Rated 5 out of 5 stars
By Heather on Aug 9, 2023

The Fat cat is no longer fat!

My boy Smaug has been suffering from bladder crystals for a little over a year now. He's been in and out of the vets office and has been cath'd multiple times. Poor guy has been through it! I had him on the science diet brand and he got so fat and he still had crystal problems. One of the vet techs told me about this brand so I figured I would give it a shot. Not only has he been crystal free for a few months now but he has lost weight! Yay! Yes, this stuff is so expensive but it is cheap compared to the vet bills! Never taking him off this stuff! Oh and I saw a question about whether this can be given to a cat that has not been diagnosed with crystals and the answer is Yes. I have another cat named Yoda and it was so tricky to try and feed them two different diets. I asked my vet and my vet said it is totally fine to give this to Yoda and definitely would not hurt. He has been on it and he is doing great! Loves it just as much as Smaug and has lost a little weight himself! Win win!!

Rated 5 out of 5 stars
By MavensMom on Aug 29, 2023

Gold standard

My cat was diagnosed with crystals at 3 years old. I did research and immediately put him on Royal Canin Urinary SO. He is now 12 years old. He’s never had a crystal or blockage or discomfort (from what I can tell, and he would tell me) since being on this food. Yes, it’s super expensive, but you really do get what you pay for with this. My cat loves the taste and texture of his food. He’s basically obsessed with it. In 9 years of eating this food, he’s never grown tired of it. Maven-recommended.

Rated 5 out of 5 stars
By DiRod on Sep 12, 2023

Hey, he likes it!

I waited, curious to see if my finicky cat would accept this new food & much to my delight, he liked it! Being an indoor cat, he needed to watch his calories. This way he can have the bulk without porking up & still prevent the bladder crystals. A win, win for both of us.

Rated 5 out of 5 stars
By MJL83 on Aug 6, 2023

Good brand for cats with urinary issues.

My cat had been experiencing urinary issues or FIC (Feline Idiopathic Cystitis). She kept peeing in areas of our home that were not normal and did it in front of me too! My veterinarian finally said she needed to go on a special prescribed formula food and recommended Royal Canin Urinary SO. It has helped tremendously with urinary inflammations and her random peeing episodes. Highly recommend this formula food for cats experiencing the same issues and has a great flavor that most cats enjoy.

Rated 5 out of 5 stars
By Betty on Aug 13, 2023

Royal Canin Verterinary Diet for my big Red Man

Red Man has been fed the Royal Canin Veterinary Diet Adult Urinary SO Moderate Calorie Dry Cat Food for most of his young 10 years. Red Man and Bailey Boy are brothers, and all my inside cats get Royal Canin Veterinary Diet Adult Urinary SO Moderate Calorie Dry Cat Food. My inside cats are Willie, Half Pint, Ido, Happy, and Springer. I have 22 outside cats in a heavenly Cat Sanctuary. They are all from the same feral colony.

Rated 5 out of 5 stars
By Sue on Jul 7, 2023

Good cat food

First off, he likes it and crunches happily away. He’s lost a couple of needed pounds while eating both this and the canned food. Cons: Simon is a long-haired half Maine Coon cat. This food does not address spring shedding and he’s thrown up hairballs and gastric juice everywhere! It took an occasional commercial can of primavera cat food and a tray of cat grass before it stopped. The *very biggest* con to this(aside from price, that is) is Chewy’s supply issues. Only a 17pound bag of this to see right now? Really? A credit card # that’s not working? Really? I used and saved the new one at the first auto ship 6 weeks ago! An email(yes, there’s one attached to my account)would have been nice telling me my order had been cancelled. Nope. Now I’m scrambling to get my cat his p/d before I run out. CHEWY, YOU’VE LOST A GOOD CUSTOMER. I’ll get my cats p/d locally, thank you.

Rated 3 out of 5 stars
By PRICE on Sep 7, 2023


The price increase over the last 2 years on this product is ridiculous! My cats don’t mind the food but I’m tired of this price gauging. I will be incorporating another food to blend in.

Rated 3 out of 5 stars