Royal Canin Veterinary Diet Urinary SO Dry Dog Food

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25.3-lb bag
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Lower urinary tract disease (LUTD) refers to a group of disorders that commonly leads to irritation of the urinary tract and corresponding undesirable clinical signs.

What causes Lower Urinary Tract Disease? In dogs, bacterial infections of the urinary tract and the presence of stones (uroliths) in the urinary tract are the most common causes. This diet promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals.

Key Benefits

  • Canine Urinary SO is a complete and balanced diet for adult dogs formulated to aid in the nutritional management of calcium oxalate and struvite urolithiasis.
  • Reduced magnesium level supports urinary health
  • Royal Canin Urinary SO Index® promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals
  • Relative Super Saturation (RSS) methodology predicts the crystallization potential of urine; RSS is used to develop diets that lower the concentration of ions contributing to struvite and calcium oxalate urolithiasis
  • Increasing the urine volume simultaneously reduces the saturation of urine with calcium oxalate and struvite crystals

Note: Royal Canin Veterinary Diets require a veterinary prescription. This product will not be shipped until a copy of a valid prescription authorization is faxed to 1-800-619-7973 or e-mailed to

See all items by Royal Canin Veterinary Diet

  • Item Number
  • Weight
    25.3 pounds
  • Brand
    Royal Canin
  • Breed Size
    All Breeds, Small, Medium, Large
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


  1. Brewers Rice, Corn, Chicken Fat, Chicken Meal, Natural Flavors, Egg Product, Corn Gluten Meal, Salt, Powdered Cellulose, Potassium Chloride, Fish Oil, Calcium Carbonate, Potassium Phosphate, Calcium Sulfate, Taurine, Choline Chloride, Vitamins [Dl-Alpha Tocopherol Acetate (Source of Vitamin E), Biotin, D-Calcium Pantothenate, Pyridoxine Hydrochloride (Vitamin B6), Vitamin A Acetate, Niacin Supplement, Thiamine Mononitrate (Vitamin B1), Riboflavin Supplement, Folic Acid, Vitamin B12 Supplement, Vitamin D3 Supplement], Marigold Extract (Tagetes Erecta L.), Trace Minerals (Zinc Oxide, Ferrous Sulfate, Zinc Proteinate, Manganese Proteinate, Copper Sulfate, Manganous Oxide, Copper Proteinate, Calcium Iodate, Sodium Selenite), Rosemary Extract, Preserved with Mixed Tocopherols and Citric Acid.
  2. New Formula: Brewers Rice, Corn, Chicken By-Product Meal, Chicken Fat, Natural Flavors, Egg Product, Powdered Cellulose, Salt, Corn Gluten Meal, Potassium Chloride, Monocalcium Phosphate, Calcium Carbonate, Calcium Sulfate, Vitamins [Dl-Alpha Tocopherol Acetate (Source of Vitamin E), Biotin, D-Calcium, Pantothenate, Vitamin A Acetate, Pyridoxine Hydrochloride (Vitamin B6), Pyridoxine Hydrochloride (Vitamin B6), Niacin Supplement, Folic Acid, Thiamine Mononitrate (Vitamin B1), Vitamin B12 Supplement, Riboflavin Supplement, Vitamin D3 Supplement, Choline Chloride, Trace Minerals [Zinc Proteinate, Zinc Oxide, Ferrous Sulfate, Manganese Proteinate, Manganous Oxide, Copper Sulfate, Calcium Iodate, Sodium Selenite, Copper, Proteinate], Taurine, Marigold Extract (Tagetes Erecta L.), Rosemary Extract, Preserved with Mixed Tocopherols and Citric Acid.

Caloric Content

  1. 3,649 kcal/kg, 288 kcal/cup
Guaranteed Analysis
Crude Protein 14.0% min
Crude Fat 14.0% min
Crude Fiber 4.7% max
Moisture 10.0% max
Magnesium 0.08% max

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Customer Reviews

Royal Canin Veterinary Diet Urinary SO Dry Dog Food is rated 4.8 out of 5 by 445.
Rated 4 out of 5 by from not sure if it is working yet.. my dog has bladder issues and was found to have crystals in her urine. Since July, she has had 3 incidents where she will have blood in her urine and strain to urinate, and have little to no control over it. It usually happens for about a day and then stops. i'm not sure if there's any other issues going on (crystals were the only thing the vet has found thus far with doing urine cultures, tests for UTI's, and ultrasounds), but this food was prescribed to her. She has been on it since some time around the end of October. She had one of those incidents in November; maybe the food hadn't been in her system long enough to work yet. So far, it seems to be working, but time will tell if this food is actually doing what it is supposed to do. Chewy has the best price on this food compared to my vet and other sites that sell this food.
Date published: 2016-12-28
Rated 5 out of 5 by from I love this! My 17 pound bag of rx dog food at my vet was $58. That was the largest they carried. I had to drive 20 minutes each way to get it. I saw someone praising on Facebook so I looked into it. My 25.7 pound bag (8# more) delivered to my door every month is the same $58! All I have to do is open the door and pull the box inside. My back and my wallet love this! To top it off I was watching animal planets show, Pit Bulls and Paroles. During the Louisiana floods this company donated a huge pile of cases of food to the rescue to help with the animals caught in the floods. They are not just making money they are sharing the love of the animals they serve too! This is a win/win all the way around for me!
Date published: 2017-02-07
Rated 5 out of 5 by from Best for bladder stones Royal Canin Urinary SO food is the one my dog likes best. He eats this up like a real treat after multiple bladder stone surgeries and several different urinary diets. So far, no recurrence of stones. I highly recommend this.
Date published: 2017-02-11
Rated 5 out of 5 by from Chewy comes thru again!! Chewy has consistently had the best product selection at the best overall prices, hands down! This special prescription food is not only hard to find, but ridiculously high priced if bought locally or at most online sources. Chewy had the best price (still high from the Mfgr!!) and with Auto Delivery, it's even better!
Date published: 2016-12-29
Rated 5 out of 5 by from Excellent service I get this food at the vet for my dog and by going through I saved $20.! I filled out the paperwork and they called my vet for the prescription and within 2 days it was delivered to my door! Great service!
Date published: 2016-11-29
Rated 5 out of 5 by from precription diet food for my dog excellent. I love being able to have my pets dog food sent right to the house. It is a prescription product and all I had to do is give Chewy my vets name and they faxed the paperwork to my vet and I was able to purchase the item very quickly and with ease. Also, after purchase, I was given a $15.00 coupon and called Chewy up. I was a first time customer and they honored the coupon! The clerk on the phone was very pleasant and helpful. that is great customer service in my book! I would recommend Chewy to all my pet owner friends! m thank you again for the great customer service.
Date published: 2016-12-13
Rated 5 out of 5 by from So far so good... I recently purchased this food for our dog who was diagnosed with calcium oxalate stones. She is very sensitive with dietary changes but so far after two weeks she has shown no signs of any reaction to this food. As well, we have not seen any further stones post her being on this brand of food. I took the advice of a fellow pet owner and placed the food in her treat canister as well to give to her as a treat and she doesn't even know the difference! Highly recommend.
Date published: 2016-11-29
Rated 5 out of 5 by from YummyInTheTummy! The vet put my 9 year old male greyhound, on this after an annual lab test. I ordered by first bag through the vet to get started, and quickly went on to see if they handled prescription food. (I am on auto ship with Blue Buffalo Senior for my four greyhounds.) Sure enough they did have it in the larger size at a substantial savings. So, deal done. Everyone is doing a happy dance. Thank you Chewy for saving my wallet, so I can save more retired racers. :-)
Date published: 2017-02-21
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