HELPS DISSOLVE STONES: Innovative urinary tract cat food helps dissolve pure struvite stones and helps prevent calcium oxalate stones

BLADDER HEALTH: Lowers the risk of crystal formation using RSS methodology for cat bladder health

S/O INDEX: The exclusive S/O Index creates an environment unfavorable to crystal formation in the bladder to support urinary health

HELPS PREVENT STONE REOCCURANCE: Specialized diet, with a reduced level of magnesium, helps prevent struvite stones from reoccurring

When your cat 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 dry cat food was developed to nutritionally support your adult cat’s urinary tract and bladder health. It increases the amount of urine your cat 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 cats. Talk to your veterinarian about keeping your cat on this urinary cat food for long-term urinary support. And ask them about the right Royal Canin wet cat food and treats to complement your cat’s diet.

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ContentBlockDailyPortion

Discover our tool that calculates the daily portion for your pet. Fill in your pet's information and you will get their daily feeding recommendation. In case of weight issues, do not hesitate to consult your vet to adapt this portion. Note that this feeding recommendation is more precise than the feeding table, therefore the values may slightly differ.

Calculate

Chicken by-product meal, brewers rice, corn, corn gluten meal, chicken fat, wheat gluten, natural flavors, wheat, salt, powdered cellulose, fish oil, potassium chloride, sodium bisulfate, calcium sulfate, sodium pyrophosphate, vegetable oil, fructooligosaccharides, choline chloride, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, biotin, riboflavin supplement, D-calcium pantothenate, pyridoxine hydrochloride (vitamin B6), vitamin A acetate, thiamine mononitrate (vitamin B1), vitamin B12 supplement, folic acid, vitamin D3 supplement], DL-methionine, taurine, monocalcium phosphate, trace minerals [zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], marigold extract (Tagetes erecta L.), rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3659 kilocalories of metabolizable energy (ME) per kilogram or 315 kilocalories ME per cup on an as fed basis (calculated).

Nutrient Amount
Crude Protein (min)32.5%
Crude Fat (min)13.0%
Crude Fiber (max)4.0%
Moisture (max)8.0%
Calcium (max)1.26%
Phosphorus (max)1.26%
Magnesium (max)0.1%.

Dry Feeding

Cat Weight Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/4 cup (26 g) 3/8 cup (33 g) 1/2 cup (39 g)
6.6 lb (3 kg) 3/8 cup (35 g) 1/2 cup (44 g) 5/8 cup (52 g)
8.8 lb (4 kg) 1/2 cup (43 g) 5/8 cup (53 g) 3/4 cup (64 g)
11 lb (5 kg) 5/8 cup (50 g) 3/4 cup (63 g) 7/8 cup (75 g)
13.2 lb (6 kg) 5/8 cup (57 g) 7/8 cup (71 g) 1 cup (85 g)

Mixed Feeding

Cat Weight Cans / Day Low Activity Medium Activity High Activity
4.4 lb (2 kg) 1/2 1/4 cup (16 g) 1/4 cup (24 g) 3/8 cup (30 g)
6.6 lb (3 kg) 1 1/8 cup (15 g) 1/4 cup (26 g) 3/8 cup (35 g)
8.8 lb (4 kg) 1 1/4 cup (23 g) 3/8 cup (37 g) 1/2 cup (48 g)
11 lb (5 kg) 1 3/8 cup (31 g) 1/2 cup (47 g) 3/4 cup (60 g)
13.2 lb (6 kg) 1 3/8 cup (37 g) 5/8 cup (57 g) 7/8 cup (72 g)
Urinary SO Dry Cat Food

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Customer reviews

ILoveMyCrazyCat
13 Aug 2021

My cat also vomiting

My cat has been on urinary so for many years due to her crystals. It’s helped immensely, however she now vomits from this food. Brought her to the vet. She’s not ill. What’s the deal Royal Canin?
CCKK
13 Aug 2021

Vomiting Issue Indeed

Cat vomiting frequency has gone up significantly after consuming this formula. Am puzzled why there is no public response from supplier despite many of the same feedback.
ZErica
09 Aug 2021

Disappointed! My cat vomits almost daily!

My cat's urinary issues cleared up when we started using this food 5 years ago. The last few months he has been vomiting daily and it appears from all the reviews my cat isn't the only one! I do remember the change in formula and bag color a while back. Royal Canin needs to figure out what is going on!
Catmom2021
09 Aug 2021

BAD BATCH? SICK CAT!

I started using Royal Canin SO Urinary dry food 10 years ago my cat had Urinary crystals. He never had a recurrence and has been perfectly healthy. A few days ago, I opened a new bag of SO URINARY and it looked and smelled different. My cat noticed, too, but ate it anyway. Within a few days, he stopped eating and started vomiting. I took him to the vet today and he was diagnosed with blood in his urine. Coincidence? I think not. PLEASE recall the current batch and notify customers of the change in formula and go back to the original formula or supplier (or correct whatever created the change in product). I will NOT use this food again unless the company goes back to using the old formula.
7CatMom
03 Aug 2021

Vomiting

All my cats are vomiting on the Urinary S/O Dry cat food.
Taylor
30 Jul 2021

Vomitting

I'm also here for the vomitting. I have been using this product since Sep 2019. Fabulous results, no crystals have returned. Though this recent batch has had my cat throw up 4-6 times. I have called customer service and shared the batch number and best buy date with them. I am happy to change my review when my cat stops throwing up.
busterbadcat
12 Jul 2021

Our 2yo cat started taking this food just 3 weeks ago after his urinary issue diagnosis. He seems to like it, but I am finding that I need to mix the food with water or make sure he doesn't take it on an empty stomach... otherwise he will vomit almost immediately. The veterinarian noted that it is a very rich food high in fat. We will cross our fingers and hope that things settle.
Royal Canin response
Thank you for the feedback and if you have any questions please reach out to our Consumer Care team at 800-592-6687
Hulu
12 Jul 2021

Really Good, But Recent Vomiting

I used the Urinary SO Aging 7+ +Calm, but my experience is identical to many reviews of this dry food. My one cat had bladder crystal at only a few years old and we put him & his brother on a urinary diet. He had more crystals at 10 years old, and we switched to this brand, they're currently 14. Recently I noticed there was quite a lot of hairballs and vomiting, but I assumed it was because of age and a recent move. Then, I had to temporarily switch to a different dry food. They liked this dry food more, and hairballs had reduced. Now I've switched back to Urinary SO 7+ +Calm and the vomiting (of mostly water) and hairballs have continued. I am planning to switch dry food brands.
JCbyTheC
06 Jul 2021

Vomiting

We love the Royal Canin brand however this SO Urinary diet dry food caused all our cats to suddenly start vomiting it back up. We will not be using it anymore until something is investigated into what is going on with the food.
Royal Canin response
I am sorry to hear that your cat has been ill. We'd like to get this looked into for you, please reach out to our Consumer Care team at 800-592-6687 with the best by and batch details from the bag. We look forward to assisting you further.
meghanm
02 Jul 2021

new formula making my cat sick too!

My cat has lost two pounds and is now grossly skinny and they can't figure out what is wrong and now I'm seeing I'm not the only one! I think he might be dying. He has been on this food his whole life and now has bad hairballs and won't eat. What did you guys do to everyone's cats!?