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).

Nutrient Amount
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)
Urinary SO + Hydrolyzed Protein Dry Dog Food

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Customer reviews

Dog Momma
19 Oct 2021

Please make snacks to complement this diet.

This food has been great for Sergeant Major's dietary, urinary, and skin allergies. But he really wants a snack :-( . Are there no snacks to complement this diet? That would be great!
20 Jun 2021

Love the formula!

My dog needs the SO diet and we started her with the hydrolyzed protein for her allergies. I love that there is a combo of the two to help with this. Since starting her on it she hasn't been licking unless to clean herself, the saliva staining is almost all gone, and she likes the different food from her siblings! Strong smell to me, but she loves it!
03 Mar 2021

Constantly Out of Stock

Ask your vet for an alternative because this is about the 5th time we have had a "backorder" of more than a month and had to scramble all over town or online trying to find a place that still has any in stock. The manufacturer offers no information on status or help. Serious production issues and whoever is in charge of production and supply should seek other employment.
15 Feb 2021

Make the Urinary SO Multi Function Hydrolyzed Protein Dry Dog Food in smaller bags for smaller dogs! I have a 7 pound Maltese!
22 Jan 2021

Cannot find anywhere

This is the only food my 14 year dog can eat. We ran out over a month ago and are feeding him something else the vet gave him that is only urinary. This is ridiculous. It has been on back order for months with no word on when it will be in stock or if you can mix the urinary and the hyrodlized together.
21 Jan 2021

Vet Tech Approved!

I've been a tech for almost 10 years now, so of course I had to have a problem child. Loki was on HP for years, and did great with it. After some routine bloodwork + urinalysis, we found some crystals in his urine. He's never been a big drinker, so I wasn't surprised. I rechecked the u/a just to make sure it wasn't a fluke, and we've been on urinary HP ever since. His most recent u/a looked great, and he had no crystals to be found! I've also loved Royal Canin and talk to everyone about them!
Doggy dog
15 Jan 2021

Do not communicate

Food is great. I just don't understand the lack of communication with costumers or retailers to let them know that formulas changed or will not be available anymore. People who have dogs with issues can't just switch the food instantaneously...
11 Jan 2021

Impossible to Find

This food is almost impossible to find. It's has been back ordered for what feels like forever now, chewy doesn't carry it, and it is not offered in the largest bag like Royal Canins other dog foods.
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.