Royal Canin Veterinary Diet Urinary SO Moderate Calorie Dry Cat Food

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17.6-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 cats, bacterial infections are far less common. Urinary crystals and stones are often linked to this disease. The most common cause of Lower Urinary Tract Disease in cats is idiopathic cystitis. This diet promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals.

Key Benefits

  • Feline Urinary SO Moderate Calorie is a highly digestible, palatable, complete and balanced adult cat food recommended for cats at risk of developing lower urinary tract disease and who are predisposed to weight gain
  • Royal Canin Urinary SO Index® promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals
  • Moderate calorie content supports healthy weight
  • Relative super saturation (RSS) methodology predicts the crystallization potential of urine. RSS is used to develop diets for cats prone to both struvite and oxalate urolithiasis.
  • Provides nutrition that aids in the management of pure struvite uroliths

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
    17.6 pounds
  • Brand
    Royal Canin
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food, Weight Control

Nutritional Info


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

Caloric Content

  1. 3,277 kcal/kg, 275 kcal/cup
Guaranteed Analysis
Crude Protein 32.0% min
Crude Fat 9.0% min
Crude Fiber 9.3% max
Moisture 8.0% max
Glucosamine 1,425 mg/kg min

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Customer Reviews

Royal Canin Veterinary Diet Urinary SO Moderate Calorie Dry Cat Food is rated 4.9 out of 5 by 299.
Rated 5 out of 5 by from been buying this for many years My male cat who was 4yrs at the time had crystals ONCE and that was one too many times. he was in such pain, couldnt pee, blood coming out and it happened on a Friday night when our vet office wasn't open so I had to take him to the VET ER. $1200 dollars later for a Friday-Sunday weekend admit on IVs and meds!! my Giovanni was brought to our vet on the Monday after the weekend and he put Gio on this urinary food for life. I go back and forth from canned and dry and he has never had any more problems with crystal. I know that there is a lot of comments on other sites that say no dry food at all and regular canned food works also but when Gio never had anymore crystals since on this food that I tend to take those comments lightly. (Giovanni is now almost 11 years!) This is the first order that I purchased the moderate calorie and he seems to like this more, not sure if its because it really does taste better or he just wanted a change. when there is a $1200 weekend vet bill I say paying more for special food is so worth not having to go through that again.
Date published: 2016-12-17
Rated 5 out of 5 by from This product saved my cat's life!! I have never had a problem with either one of my cats until the end of this December. My little Sammy is 6 years old and developed stones/crystals in his bladder to the point where he was just urinating blood. My vet recommended Royal Canin to me and after reading wonderful reviews about it, I had to get it. Today was Sammy's 2 week follow up and there is no blood and no signs of stones/crystals in his urine. Knowing that this food has worked wonders and surgery is not an option, I feel every cat owner should know about it. Although it is a little pricey I have no problem keeping both of my cats on this food for the rest of their lives. I would not have been able to afford surgery and I am just so grateful for this company and the products they produce!!
Date published: 2017-01-20
Rated 5 out of 5 by from This product will keep my cat healthy. This product is designed to keep male cats from forming crystals and stones in their urinary tract. The cats didn't like it at first but now have accepted it and are doing fine. The vet saved my cat and this food will keep him healthy.
Date published: 2017-02-06
Rated 5 out of 5 by from Very Effective Diet for Maintaining Urinary Tract Health in Neutered Males The Royal Canin Veterinary Diet Urinary SO Moderate Calorie Dry cat food formula has been a godsend for our neutered male cat who has had 2 struvite crystal induced UTI's in the recent past. It performs exactly as described by discouraging formation of uroliths, increasing urinary volume, and encouraging the desire to drink more water. We make certain that Hector has plenty of fresh, cold water and the food itself does the rest in maintaining optimal health. Hector is frisky and bright eyed again after being on the Urinary SO formula. Incidentally, I spoke to a veterinary technician at Royal Canin who was very helpful. I was concerned that feeding Hector strictly dry cat food might still put him at risk for future UTI's; however the technician did an excellent job explaining how the formula works and reassured me that the dry formula alone is adequate for preventing formation of crystals. offers the best price anywhere on this rather expensive dry cat food, and they have outstanding customer service.
Date published: 2014-03-01
Rated 5 out of 5 by from Couldn't tell the difference My rescue cats 3 aren't finicky eaters but I do like to feed them quality food. They deserve it for all I receive from them. After being put on the Urinary diet in February 2016 it seemed as if they were becoming a bit pudgy. VERY happy to find the Royal Kanin in reduced calorie. They didn't blink an eye with the switch. When the box comes ONE of the cats always gets on the counter as I transfer the food to smaller airtight containers to watch. As the containers fill he has to "taste test" each one before the lids go on. Pica gives this food his Meow of approval
Date published: 2016-11-28
Rated 5 out of 5 by from Best food ever so recommend This food has saved my cats life I am so thankful that People told me to get it and try it my cats are loving it it will help them stay out of the hospital with a urinary cloggage thx to all who helped me out .
Date published: 2017-01-13
Rated 5 out of 5 by from Cat with urinary tract problem This cat food is by prescription. But took care of getting it from the vet. Now I don't have to go to the vet's office to get it! It's delivered to my door! Thanks!
Date published: 2017-01-17
Rated 5 out of 5 by from Our cats love it Our vet prescribed this because one of our cats has a bladder stone problem. They both eat it and they both love it. Ditto for the canned food.
Date published: 2016-12-27
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