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Vet Products

Helps dissolve pure struvite stones and helps prevent calcium oxalate stones

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

Supports urinary health with an exclusive S/O Index, and creates an environment unfavorable to crystal formation in the bladder

Helps prevent struvite stones from reoccurring

When your dog has urinary issues, easing their discomfort requires special care. But with the help of your veterinarian and Royal Canin, there’s not just hope—there can be a true difference.

This veterinary-exclusive wet dog food was developed to nutritionally support your adult dog’s urinary tract and bladder health. It increases the amount of urine your dog produces to help dilute excess minerals that can cause crystals and stones. Relative Super Saturation (RSS) methodology is used 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. And this specialized nutrition, with a reduced level of magnesium, helps dissolve pure struvite stones and prevent struvite stones from forming. Lower urinary tract issues may be a recurring concern for some dogs. Talk to your veterinarian about keeping your dog on this urinary dog food for long-term urinary support. And ask them about the right Royal Canin dry dog food and treats to complement your dog’s diet.

Water sufficient for processing, chicken liver, chicken by-products, pork by-products, corn grits, Corn starch, vegetable oil, powdered cellulose, salt, monocalcium phosphate, natural flavors, guar gum, potassium chloride, carob bean gum, fish oil, taurine, calcium sulfate, carrageenan, DL-methionine, choline chloride, vitamins [vitamin E supplement, 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), vitamin B12 supplement, riboflavin supplement, vitamin D3 supplement, folic acid], trace minerals [zinc oxide, ferrous sulfate, zinc proteinate, copper sulfate, manganous oxide, sodium selenite, calcium iodate], magnesium oxide, marigold extract (Tagetes erecta L.).

Calorie Content

This diet contains 1242 kcal ME/kg; 478 kcal ME/can on an as fed basis (calculated).

Crude Protein (min)5.6%
Crude Fat (min)5.9%
Crude Fiber (max)2.1%
Moisture (max)73.5%.

Wet Feeding

Dog Weight Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/4 can (118 g) 1/4 can (137 g) 1/2 can (156 g)
8.8 lb (4 kg) 1/2 can (199 g) 1/2 can (230 g) 3/4 can (262 g)
19.8 lb (9 kg) 1 can (366 g) 1 can (423 g) 1 1/4 cans (481 g)
28.7 lb (13 kg) 1 1/4 cans (482 g) 1 1/2 cans (558 g) 1 3/4 cans (634 g)
39.7 lb (18 kg) 1 1/2 cans (615 g) 1 3/4 cans (712 g) 2 cans (809 g)
50.7 lb (23 kg) 2 cans (739 g) 2 1/4 cans (856 g) 2 1/2 cans (972 g)
59.5 lb (27 kg) 2 1/4 cans (834 g) 2 1/2 cans (965 g) 2 3/4 cans (1,097 g)
68.3 lb (31 kg) 2 1/2 cans (925 g) 2 3/4 cans (1,070 g) 3 1/4 cans (1,216 g)
79.4 lb (36 kg) 2 3/4 cans (1,034 g) 3 cans (1,198 g) 3 1/2 cans (1,361 g)
88.2 lb (40 kg) 3 cans (1,119 g) 3 1/4 cans (1,296 g) 3 3/4 cans (1,473 g)
99.2 lb (45 kg) 3 1/4 cans (1,223 g) 3 3/4 cans (1,416 g) 4 1/4 cans (1,609 g)

Mixed Feeding

Dog Weight Cans / Day Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/4 1/8 cups (8 g) 1/8 cups (14 g) 1/4 cups (20 g)
8.8 lb (4 kg) 1/4 3/8 cups (35 g) 1/2 cups (46 g) 5/8 cups (57 g)
19.8 lb (9 kg) 1/2 5/8 cups (60 g) 7/8 cups (79 g) 1 1/8 cup (99 g)
28.7 lb (13 kg) 1/2 1 1/8 cup (99 g) 1 3/8 cup (126 g) 1 3/4 cup (152 g)
39.7 lb (18 kg) 1 7/8 cup (79 g) 1 1/4 cup (112 g) 1 5/8 cup (146 g)
50.7 lb (23 kg) 1 1 3/8 cup (122 g) 1 7/8 cup (162 g) 2 1/4 cup (202 g)
59.5 lb (27 kg) 1 1 3/4 cup (154 g) 2 1/4 cup (199 g) 2 3/4 cup (245 g)
68.3 lb (31 kg) 1 2 1/8 cup (186 g) 2 5/8 cup (236 g) 3 1/4 cup (286 g)
79.4 lb (36 kg) 1 2 1/2 cup (223 g) 3 1/8 cup (279 g) 3 3/4 cup (336 g)
88.2 lb (40 kg) 1 2 7/8 cup (252 g) 3 1/2 cup (313 g) 4 1/4 cup (374 g)
99.2 lb (45 kg) 1 3 1/4 cup (288 g) 4 cup (354 g) 4 3/4 cup (421 g)
Royal Canin Veterinary Diet Canine Urinary SO Canned Dog Food

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Customer reviews

20 Jun 2020

They changed the formula

My dog itched and was passing gas. Why change if it was not broken. Please go back to original formula.
Meshas Mom
23 Apr 2020

Formula must have changed!

My dog has been on Royal Canin SO for years, I went to my vet to purchase and saw the label had changed from green to gold, they assured me the formula had not changed only the label and they make it more of a fancy pate now? The smell is stronger upon opening and with 24 hrs. of feeding this my dog started scratching, stopping in mid motion to scratch. Now what do I do?
13 Apr 2020

Something has changed

I am not sure what has changed, but my 15 year old Yorkie has been on Royal Canin SO canned for probably 5 or 6 years. Even when I fed him raw, he was never big on drinking a lot of water. But now he is on his 2nd can with the apparent reformulation, he has been needing to drink quite a bit more water. This didn't start until about the 2nd day of starting the new can of food.
23 Feb 2020

Something isn't the same

My Westie has been on this food since emergency surgery for stone blockage nearly four years ago.. She loved the wet canned version. We receive our shipments from Chewy. The recipe is no longer the same the chunks are larger and our 20 lb dog is having trouble processing it. For thee time being I have switched her to the small dog urinary DRY kibble but would love to get back to the wet food she enjoyed and thrived on. I also noticed that there is no longer a moderate calorie version? Didn't know whether to blame Chewy or you guys for the change.
21 Feb 2020

Formula has changed!!!!!!

My dog has been on this food for over three years.....they somehow have changed the ingredients/formula in the canned food....My dog has problems eating this canned food now (very gassy).....Please change back to original.... She does still eat the dry food.Thank You
28 Jan 2020


My dog has been on this food for years and I’ve never had an issue until now. I get the case auto-shipped and recently, I notice that the cans has changed and the food looks different. So far, I can’t give this new food to my dog because he gets sick from eating it; therefore, I’ve pretty much wasted my money on this food.
10 Nov 2019

My dog loves it.

My dog has been eating this for 12 years for her urinary problems.
05 Nov 2019

Urinary SO

This food has worked well, my dog had bladder stones several times needing surgery. He was then put on this diet. It has been years now and the stones have not returned!!
Royal Canin response
Great to hear!
31 Oct 2019

It works!

I’ve been using this product for my dog for over a year now. He did have bladder stone surgery before being put on the diet, and now that he’s on it, he still gets stones, but they are small enough to pass through his urine. So I’m thankful there’s a diet to help him out.
31 Oct 2019

Works well but expensive

This product has worked well for years for my dog. Only problem is, it is very expensive
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