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

  • Recommended for dogs under 22 lbs at risk of developing lower urinary tract disease
  • Dissolution of pure struvite uroliths
  • Help prevent struvite, calcium oxalate and phosphate uroliths
  • Provides nutrition that aids in the management of pure struvite uroliths
  • 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
  • Contains nutrients to support healthy teeth
  • 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
    8.8 pounds
  • Brand
    Royal Canin
  • Breed Size
    Small, Extra Small
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


  1. Brewers Rice, Corn, Chicken Fat, Chicken Meal, Corn Gluten Meal, Natural Flavors, Salt, Egg Product, Wheat Gluten, Potassium Chloride, Vegetable Oil, Powdered Cellulose, Monocalcium Phosphate, Fish Oil, Calcium Sulfate, Dl-Methionine, Fructooligosaccharides, Sodium Tripolyphosphate, L-Lysine, Taurine, Choline Chloride, Monosodium Phosphate, Vitamins [Dl-Alpha Tocopherol Acetate (Source of Vitamin E), Biotin, D-Calcium Pantothenate, Vitamin A Acetate, Niacin Supplement, Pyridoxine Hydrochloride (Vitamin B6), 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.

Caloric Content

  1. 3,727 kcal/kg, 358 kcal/cup
Guaranteed Analysis
Crude Protein 18.0% min
Crude Fat 15.0% min
Crude Fiber 3.7% max
Moisture 10.0% max

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Customer Reviews

Rated 4.8 out of 5 by 70 reviewers.
Rated 5 out of 5 by Product as expected This is the item that our Vet prescribed. My mini poodle likes it. It arrived intact and the process of ordering and delivery is seemless. Looking forward to be a regular customer October 22, 2016
Rated 5 out of 5 by This product works After using this for one month on the vet's reccomendtion, 3 bladder stones disolved,& the crystals in his urine were greatly reduced. We will continue to use to ward off any future urinary tract infections & bladder stones, & to keep cyrstals at a minimum. I don't know how it works, but it's a great product! October 14, 2016
Rated 5 out of 5 by Make frozen treats with food I have 3 dogs, shih tzu's all on RX diet food. No treats allowed or they get crystals. Here is what I do and my dogs love love love them. Freeze a little bit of their food in ice cube trays and give as snacks. They go nuts over it! My vet said I can use any RX urinary foods, since I had some Hills CD and Purina Urinary food left over. September 28, 2016
Rated 5 out of 5 by Perfect for small dogs The food is small enough for our aging Maltese and she is really enjoying it. Very happy we discovered this particular packaging. September 22, 2016
Rated 4 out of 5 by Good I need the weight control formula, but this works as a sub. September 21, 2016
Rated 5 out of 5 by My dogs love this product!! My dog recently had bladder stones, and the Vet recommended this product; I was afraid he wouldn't eat (he's picky!!) but, not only did he love it, my other dog does too!! September 14, 2016
Rated 5 out of 5 by Able to get prescription food It is nice to be Able to get prescription food at a lower price. September 15, 2016
Rated 5 out of 5 by The product is of good quality. I was very impressed with the level of customer service and of the knowledge that the representative possessed in helping me with my first order. The order was delivered in a timely manner. September 5, 2016
  • 2016-10-31 T06:44:45.186-05:00
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