HELPS PREVENT STONES: Specialized adult cat food helps dissolve pure struvite stones and helps prevent calcium oxalate stones

WEIGHT MANAGEMENT: Low calorie cat food (10% less calories than Royal Canin Urinary SO Dry Cat Food) for ideal weight maintenance

BLADDER HEALTH: RSS methodology for cat bladder health helps lower the risk of crystal formation

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

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. Moderate calorie content (10% less than Royal Canin Urinary SO dry cat food) helps them maintain a healthy weight. 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. 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, powdered cellulose, wheat gluten, natural flavors, chicken fat, salt, fish oil, potassium chloride, calcium sulfate, egg product, sodium bisulfate, vegetable oil, sodium pyrophosphate, DL-methionine, fructooligosaccharides, monocalcium phosphate, 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], taurine, 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.), L-carnitine, rosemary extract, preserved with mixed tocopherols and citric acid.

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).

Nutrient Amount
Crude Protein (min)32.0%
Crude Fat (min)9.0%
Crude Fat (max)13.0%
Crude Fiber (max)9.3%
Moisture (max)8.0%
Calcium (max)1.4%
Phosphorus (max)1.3%
Magnesium (max)0.08%.

Dry Feeding

Cat Weight Low Activity Medium Activity
4.4 lb (2 kg) 3/8 cup (29 g) 3/8 cup (36 g)
6.6 lb (3 kg) 1/2 cup (39 g) 5/8 cup (49 g)
8.8 lb (4 kg) 5/8 cup (48 g) 3/4 cup (60 g)
11 lb (5 kg) 5/8 cup (56 g) 7/8 cup (70 g)
13.2 lb (6 kg) 3/4 cup (64 g) 1 cup (80 g)
15.4 lb (7 kg) 7/8 cup (71 g) 1 cup (89 g)
17.6 lb (8 kg) 7/8 cup (78 g) 1 1/8 cups (98 g)

Mixed Feeding

Cat Weight Cans / Day Low Activity Medium Activity
4.4 lb (2 kg) 1 1/8 cup (10 g) 1/4 cup (19 g)
6.6 lb (3 kg) 1 1/4 cup (20 g) 3/8 cup (32 g)
8.8 lb (4 kg) 1 3/8 cup (29 g) 1/2 cup (44 g)
11 lb (5 kg) 1 1/2 cup (37 g) 5/8 cup (56 g)
13.2 lb (6 kg) 1 1/2 cup (45 g) 3/4 cup (67 g)
15.4 lb (7 kg) 1 5/8 cup (52 g) 7/8 cup (77 g)
17.6 lb (8 kg) 1 3/4 cup (59 g) 1 cup (87 g)
Urinary SO Moderate Calorie Dry Cat Food

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Customer reviews

PK89
24 Mar 2025

Stay away

This product is filled with carbs! My cat was on this food and now is diabetic. Thank you Royal Canin for making garbage and selling it at exorbitant prices.
Royal Canin response
Hello, We are really sorry to hear about your experience. Please reach out to us at our email address: [email protected]
mmw2024
02 Apr 2024

Love it “so far so good”

So far so good 🐈‍⬛Kaya 🐈‍⬛ Leilani ~ Ages 3 yrs 4 months approx as of today 4/2/2024 I’m creating my profile today on this date. I have “2” female black cats, I guess you would call mixed breeds, rescues from the ASPCA black cats. “Kaya” is all Black (tiny tiny flecks of white here and there) and “Leilani“ is black/white tuxedo. They are from different litters. Sweet loving, cuddling girls. On January 1, 2024 after observing for just maybe two days I rushed Kaya to the emergency clinic. She had only tiny bits of urine, and those were bloody. The ER took bloodwork, no x-rays and put her on an antibiotic telling me see the bet the next day, so I did. Harris Hill Animal Hospital, Clarence, NY. They did a complete work up, bloodwork again urine analysis and x-rays and they found 2 bladder stones I don’t know the centimeters or millimeters or whatever but one was bigger than the other. They gave me two options, start her and a urinary diet to see if they might shrink or disappear or do surgery. They explained that if they were Servite crystal stones, they could possibly dissolve if they were the other kind I can’t think of the name they would never dissolve, but there was no way to find out which they were without surgery. (I had the same issue with my previous tuxedo cat, did surgery (DIFFERENT VET)for $1200 and she showed me the stones afterwards they were huge. (She passed away) I won’t go into that because we’re not talking about that cat. Anyway, I opted for Kaya to start the urinary formula and try it. I would have done the surgery immediately. However, the antibiotics seem to clear up the blood and whatever other medication they gave to her. I don’t recall she seemed better again I would’ve opted for the surgery however, this estimate one year later of the other cat was between $4500 and $5300 on the high-end. I was shocked granted this vet was in a much. How can I say higher income area even though I was not the other Vet was in a lower income area because that’s where I got the original kitten but she was a nasty sort of a doctor I didn’t like her, so I switched to this Harris Hill because it’s around the corner from me. I love them, I did not love the price estimate of the surgery I could not do that. So it was a matter of try the food and see if it would work, we first started on Purina, The vet carried this, so you know how that goes. They get special signs and rubber mats for the floors and rubber mats for each examining table etc. etc. etc. with the Purina logo on it. Kickback from the company? I’m not sure but I guess that’s neither here or there it made them throw up) so I did this for both cats even though Leilani was perfectly healthy. She had the complete work up also. Well, within three or four days of weaning them off of ACANA I’m sure many of you know is a very high-end cat food. They proceeded to start to throw up this Purina. I called Chewey.com, they exchanged both the dry and the wet, the problem continued. When I opened the cans of the Purina, the food looked gray I mean gray, no red meat Appearance whatsoever. I asked the vet she said well you can change to either hills or Royal Canaan. I acted for Royal Canin Urinary SO , and have been very happy so far (as of 4/2/24). They were on the diet for about two months. I gave it to them both. It’s impossible to try and feed cats with different foods so they both were eating it and loving it. My problem is they’re not satisfied with the recommended about they cry. They did not do this on ACANA, they ate only what they were supposed to. So I find myself putting little snacks like two or three kibbles several times a day in their dish so now they know they’ve got me lol and it continues. However, I brought.Kaya back the first time, another x-ray, the stones seem to be of a lighter color, the vet thought they were probably/maybe dissolving. Continue the food another month bring her back the x-rays showed they are “gone“ no stones whatsoever that she can see again I talked with her about the surgery price and what I paid at the other Vet and I got the explanation well you know price have gone up since Covid blah blah blah. I told her if this doesn’t work I’m going to have to put her down so she said she would do a revision I asked can’t you give me some sort of a discount or go over this to see if maybe something might be different with this estimate so they did and what it ended up being was about $400 if we needed the high end so $400 off of five grand but what I would have to do is take her home the very same day as surgery no overnight day for observation and yes, a couple of other essential things so I repeated well if this doesn’t work we’re going to have to put her down. I cannot afford this so anyway back to right now today April 2, 2024. She is clear of stones happy as can be Leilani is also they both are eating the food. I just have a problem with this portion control. They get the dry in the morning and during the day and the wet, approximately 3/4 of a can split between the two of them. So far I am a happy camper with Royal Canin! The cost yeah it’s pricey $114 for a bag of dry I don’t know almost $38 give or take for 12 cans. They like the loaf which I am thankful for because it appears you can give a larger amount of food to satisfy them with the solid loaf further than the minced pieces in gravy even though I know there are 5.1 ounce cans. Thank you for listening I will change, this as we progress with an update. I just have to figure out this dry portion control so far they maintain their weight but it’s climbing out by out I think not sure hope this helps someone.
Royal Canin response
You are welcome to contact us by email if you need any help.
Patchthecat
03 Dec 2023

Great health

Our cat was diagnosed with bladder stones (15-20 Stones) and we were facing $5000+ in surgery. Took our cat back for a second opinion, Royal Canin SO Urinary was prescribed. Two weeks, 3 xrays and one ultrasound later....NO STONES!!
SuzMcD
25 Oct 2023

Bad Batch?

My cats have been eating this for 4 years. This last bag, which I opened last week - one was vomiting for 2 days and now won't touch it. The other one just projectile vomited it all over this morning. This is the first time this has ever happened and I am concerned it's a bad bag.
Unsatisfied customer
14 Jan 2023

INSANE Price hikes!

This food was $70/bag less than two years ago which was already crazy… it is now $105 for a 17lb bag!!! RIDICULOUS! My cat needs this or it will die and this company is taking advantage of the current economic climate and drastically hiking their prices because they know we have no other choice if we care about the health of our animals. So infuriating when a company claiming to care about my animal is only worried about digging deeper in my pockets for profit. Shame on you. Plus your food makes my cat vomit multiple times a week after eating- especially when it’s a fresh bag or at the end of the bag of food. Sad I don’t have another option or I’d RUN in that direction.
Judie ann
18 Nov 2022

My cat has been on R. C. Urinary moderate calorie for a while now and all he does is vomit. I thought he was just a piggy as it was whole pieces undigested, but after being concerned I read the reviews and it seems to b a common problem
Cats Rock
05 Jun 2022

No more worries

After my boy plugged, I put him on the S/O. All 3 of my cats eat it and love it.
Stanley
31 May 2022

Good Health Diet

He has been on it for 3 years and is alt mor frisky and very healthy.
Dee64
31 May 2022

Good

My cats love it. Their weight is getting better each time
Catmom23
31 May 2022

My cat loves it!

My vet recommended I start my 10 year old cat on this product. Although she hasn’t developed crystals, she has shown the beginning signs of it. She has only been on this food for about one month, but she really loves the taste and so far has been doing well on it.