Royal Canin Veterinary Diet® Feline Urinary SO® Moderate Calorie dry cat food

Founded by a veterinarian, Royal Canin has over 40 years experience in health nutrition. Our work with pet nutritionists, breeders, and veterinarians from around the world has provided us with knowledge about the specific nutritional requirements of cats. This knowledge has allowed us to formulate the optimal diet for your cat's special needs.

  • Supports urinary health
  • Moderate calorie content supports healthy weight
  • Royal Canin Urinary SO Index® promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals
  • 100% Complete and Balanced Nutrition
  • 100% Satisfaction Guaranteed

Feline Urinary SO Moderate Calorie is a highly digestible, palatable, complete and balanced adult cat food formulated to aid in the nutritional management of calcium oxalate and struvite urolithiasis.

Where to Buy
Size: 17.6 lb
Size: 3.3 lb
Size: 6.6 lb
Product Information

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.

Moderate Calorie
Moderate calorie content, compared to Feline Urinary SO, to help maintain ideal weight.

Feeding Guide
Recommended Daily Feeding Portion
Weight Tendency to become Overweight Ideal Weight
4.4 lb (2.0 kg) - 3/8 cup (36 g)
5.5 lb (2.5 kg) - 1/2 cup (43 g)
6.6 lb (3.0 kg) - 5/8 cup (49 g)
7.7 lb (3.5 kg) - 5/8 cup (54 g)
8.8 lb (4.0 kg) - 3/4 cup (60 g)
9.9 lb (4.5 kg) - 3/4 cup (65 g)
11.0 lb (5.0 kg) 5/8 cup (56 g) 7/8 cup (70 g)
13.2 lb (6.0 kg) 3/4 cup (64 g) 1 cup (80 g)
15.4 lb (7.0 kg) 7/8 cup (71 g) 1 cup (89 g)
17.6 lb (8.0 kg) 7/8 cup (78 g) 1 1/8 cups (98 g)
19.8 lb (9.0 kg) 1 cup (85 g) 1 1/4 cups (106 g)
22.0 lb (10.0 kg) 1 1/8 cups (92 g) 1 3/8 cups (114 g)
Urinary SO Moderate Calorie is formulated to meet the nutritional levels established by the AAFCO (Association of American Feed Control Officials) Cat Food Nutrient Profiles for maintenance.

Chicken by-product meal, brewers rice, corn gluten meal, corn, powdered cellulose, wheat gluten, chicken fat, natural flavors, salt, potassium chloride, fish oil, calcium sulfate, monocalcium phosphate, egg product, sodium bisulfate, vegetable oil, DL-methionine, fructooligosaccharides, choline chloride, 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), folic acid, vitamin B12 supplement, vitamin D3 supplement], glucosamine hydrochloride, taurine, trace minerals [zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, copper proteinate, sodium selenite], L-carnitine, marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.


Guaranteed Analysis
Crude Protein (min) 32.0%
Crude Fat (min) 9.0%
Crude Fiber (max) 9.3%
Moisture (max) 8.0%
Glucosamine* (min) 1425 mg/kg
*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profiles.
Calorie Content
This diet contains 3277 kilocalories of metabolizable energy (ME) per kilogram or 275 kilocalories ME per cup on an as fed basis (calculated).
Product Reviews
Royal Canin Veterinary Diet ® Feline Urinary SO ® Moderate Calorie dry cat food is rated 4.9 out of 5 by 743.
Rated 5 out of 5 by from Pleasant Smelling Highly Palatable Cat Food I have an almost 13 year old Himalayan and a 9 year old Himalayan that have both been on the Feline Urinary SO diet since they were kittens. I have a 6 year old Persian as well, so far he's been healthy. It's funny how my cats love their dry food and even the one that doesn't need the Urinary SO prefers it over his dry cat food. Thank you for keeping my kitties healthy and making a food that smells good even to the humans in the house and making something that makes them happy. I've found most "special dietary foods" are not that palatable and it's hard getting them to eat it. They love Royal Canin Urinary SO and I couldn't be happier!
Date published: 2016-05-26
Rated 5 out of 5 by from beyond pleased!! Over a year ago my cat Pepper was switched to this food, he's a diva so he eats dry and moist from this company. He had a urinary blockage which started us in the food. Not only did this food make his issues go away, he acts like a total different cat. He has a whole new personality not that he is pain free and it makes me love him even more, which I thought was impossible. His purr can be heard a mile away, thank you for making that possible. The only down fall is the food is very expensive for myself, but having my baby boy healthy is priceless!! Sincerly, Julia Ladner P.S you should send out monthly coupons!!
Date published: 2015-08-12
Rated 5 out of 5 by from Goodbye Urinary Tract Infections !! My cat Tux suffered from severe urinary tract infections and was hospitalized several times and almost died....He has been on Royal Canin S/O for months now, both the dry and canned food.....Tux is now a happy and extremely healthy cat !!! I could not have done it without you... Thank you Royal Canin !!!! and Tux thanks you too !!
Date published: 2015-08-10
Rated 5 out of 5 by from Magic in a Bag! My male himalayan has been on this diet for OVER 7 years and has not had a single relapse of his FLUTD symptoms! Well, except when times got tough and I attempted to transition him to a non prescription diet (canned only!) and the FLUTD symptoms came back within a month! Needless to say - THIS is his diet for life! I am especially loving Royal Canin's S/O index being included into other prescription diets - it gives me peace of mind to know that later in life if other problems occur, the chances of safely transitioning him to a different diet is possible! Thank you Royal Canin!
Date published: 2015-08-11
Rated 5 out of 5 by from Great Preventative Care In 2008 my one year old kitty, Molly Jones, was demonstrating inappropriate urination behavior, i.e. she was urinating in the bathroom sink. My veterinarian drew a urine sample, suspecting to find a bacterial infection. Instead we discovered the precursor to crystals in her urine. He recommended Royal Canin Urinary S/O for both Molly and her brother Desmond Jones. Seven years later the Jones' are still eating Urinary S/O and all urination problems solved. Might I venture to say to say that Urinary S/O was the "purrfect" solution.
Date published: 2015-09-02
Rated 5 out of 5 by from EVERYONE likes it! A year ago my elderly FIV+ kitty was diagnosed with pancreatitis, and after a day of IV fluids blocked up during the night. So he needed a change of diet and my vet recommended this (in part, because they have to lock it up or cage their office cats, because they break into the bags). Since then another cat in the house has come to need it, so we feed it to all 7 who are sharing the same space. All LOVE it. Our most recent cat, a former feral, totally abandoned his previous food as soon as he was given the run of the house in favor of SO. This is amazing, because I remember with my first cat who had urinary issues that she definitely didn't like the only urinary diet available at that time.
Date published: 2016-05-09
Rated 5 out of 5 by from The best! My cat is 12 years old and has been on this food for about three years. Before that she was on another brand, although it kept her bladder condition under control it put a lot of weight on her which was not healthy so I started to research other foods. I also put her on a diet. She lost five pounds over a year and now weighs just over 10lbs. The Urinary S/O Moderate Calorie is the best of all worlds for my cat. She is healthy and her weigh is ideal. Thank you Royal Canin.
Date published: 2015-08-12
Rated 5 out of 5 by from MIRACLE CAT FOOD Our vet put our cat Fiona on this food after numerous UTI's and surgery to remove stones from her bladder. That was 3 years ago. She hasn't had a problem since! This food is amazing! I starting feeding it to our other cats "just in case". It is expensive, but if it keeps my babies from having UTI's and surgery, I will continue to buy it. It truly is a "miracle food". Just wish all cat owners could afford this food for their "babies". It would keep other cats from suffering with UTI's and surgery. In this economy, so many pet owners must prioritize what to spend their money on. Unfortunately, pets are usually the ones to suffer.
Date published: 2016-05-10
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