Helping cats and dogs live their healthiest lives.
Sacred Birman kitten stood next to an adult Yorskhire Terrier in black and white.

Helps dissolve and prevent pure struvite stones and helps prevent calcium oxalate stones

Lowers the risk of crystal and stone formation using RSS methodology for bladder health

Highly palatable hydrolyzed proteins help to reduce skin and GI reactions that may be a result of food sensitivities to common proteins found in pet food

Supports healthy digestion and reinforces the skin barrier with nutrients to support and maintain healthy skin

Whether this is your dog’s first urinary issue or he has developed food sensitivities and needs ongoing urinary care, your vet recommended Royal Canin Urinary SO + Hydrolyzed Protein for a reason. This veterinary-exclusive dry dog food was developed to nutritionally support your adult dog’s urinary tract and bladder health. It’s designed with Relative SuperSaturation (RSS) methodology to help lower ion concentration in urine, which contributes to stone formation. This formula promotes a urinary environment unfavorable to the formation of both struvite and calcium oxalate crystals. It also features highly digestible hydrolyzed protein, which helps reduce the risk of stomach and skin signs in dogs with food sensitivities. Talk to your veterinarian about keeping your dog on this urinary dog food with Royal Canin Hydrolyzed Protein Treats for long-term urinary tract support.

Brewers rice, hydrolyzed soy protein, chicken fat, natural flavors, dried chicory root, salt, vegetable oil, pea fiber, fish oil, calcium sulfate, potassium chloride, sodium silico aluminate, monocalcium phosphate, fructooligosaccharides, taurine, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, D-calcium pantothenate, biotin, pyridoxine hydrochloride (vitamin B6), riboflavin supplement, thiamine mononitrate (vitamin B1), vitamin A acetate, vitamin B12 supplement, folic acid], choline chloride, DL-methionine, N-butyric acid, trace minerals [zinc proteinate, zinc oxide, manganese proteinate, manganous oxide, copper sulfate, ferrous sulfate, sodium selenite, copper proteinate, calcium iodate], GLA safflower oil, marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3592 kilocalories of metabolizable energy (ME) per kilogram or 327 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)18.0%
Crude Fat (min)13.0%
Crude Fiber (max)3.9%
Moisture (max)10.0%
Calcium (max)0.73%
Phosphorus (max)0.7%
Magnesium (max)0.07%.
Dog Weight Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/2 cup (42 g) 1/2 cup (49 g) 5/8 cup (56 g)
11 lb (5 kg) 7/8 cup (84 g) 1 1/8 cups (97 g) 1 1/4 cups (111 g)
22 lb (10 kg) 1 1/2 cups (141 g) 1 3/4 cups (164 g) 2 cups (186 g)
33.1 lb (15 kg) 2 1/8 cups (191 g) 2 3/8 cups (222 g) 2 3/4 cups (252 g)
44.1 lb (20 kg) 2 5/8 cups (238 g) 3 cups (275 g) 3 3/8 cups (313 g)
Royal Canin Veterinary Diet Canine Urinary SO + Hydrolyzed Protein Dry Dog Food

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Customer reviews

20 Aug 2020

02 Dec 2019

Works Great for my shih tzu

I started buying this food about 10 months ago. We were previously on a Royal Canin diet for food allergies. After a urinary test we were surprised to find crystals. After a repeated urinalysis we decided to change his diet to the multi-function. We have done multiple rechecks since the food switch and each time there were absolutely no crystals found in any of them. My shih tzu loves the food and it's the best nutrition I can provide for him.
30 Oct 2019

Riley loves it!

Haven't had to have another surgery since switching to this food.
30 Oct 2019

It has worked well for my 11 year old Dalmatian's combined urinary and digestive issues.
30 Oct 2019

Been great for our Bischon

Have used this for 6 years at Vet recommendation. Buddy has not had any further urinary issues. A WINNER!!!
30 Oct 2019

It really works!

My dog has been on this product for a year and no more bladder stones!!
30 Oct 2019

have been using this for years she has had no crystals and no more infections...
30 Oct 2019


Our dog has been on this food for over 6 months. The number of crystals in her urine have declined substantially. Awaiting more good news. And she likes it.
30 Oct 2019

Urinary bladder issue seems under control

My 12 year old dog has been eating this product ( both dry and wet food) for over 6 years after she had multiple bladder stone issue. She has been doing very well with this product. However, they are quite expensive. I wish the price would drop so that more people can buy them.
23 Oct 2019

Great Food!

My dog Everett was about 9 when he developed a chicken allergy! He lost a significant amount of his coat and licked nonstop! After trying so many different dry foods we finally sampled this! He is 15 never licks and has grown all his lost fur back! Thankyou so much!