Royal Canin Veterinary Diet Urinary UC Low Purine Dry Dog Food, 18-lb bag

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This prescription item requires vet approval. Details


Cystine stones (uroliths) occur when an inherited defect of the kidneys causes a build up of cystine in the dog’s urine. Cystine is an amino acid that is filtered and reabsorbed by the kidneys. The build up of this amino acid in the urine leads to the formation of cystine stones. Certain breeds are more affected than others by cystine urolithiasis. These include English Bulldogs, Newfoundlands, Dachshunds, Chihuahuas, and Mastiffs. Mixed breed dogs with the ancestry of these genetically susceptible breeds can also be affected.

Key Benefits

  • Canine Urinary UC Low Purine is a highly digestible, palatable, complete and balanced adult dog food formulated to meet the nutritional needs of adult dogs prone to urate, cysteine and xanthine urolithiasis.
  • Low purine proteins combined with the production of alkaline urine help reduce the risk of urate stones
  • Contains moderate quantities of high quality proteins and controlled methionine and cysteine levels
  • Formula increases the urine volume to simultaneously reduce the saturation of urine with struvite and calcium oxalate precursors. - See more at:
  • Enhanced levels of linoleic acid, zinc, and biotin help to promote a healthy skin and shiny coat

Note: Royal Canin Veterinary Diets require a veterinary prescription. This product will not be shipped until a copy of a valid prescription authorization is faxed to 1-800-619-7973 or e-mailed to

See all items by Royal Canin Veterinary Diet

  • Item Number
  • Weight
    18.0 pounds
  • Brand
    Royal Canin
  • Breed Size
    All Breeds, Small Breeds, Medium Breeds, Large Breeds
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


Brewers Rice, Corn, Wheat, Egg Product, Chicken Fat, Corn Gluten Meal, Natural Flavors, Monocalcium Phosphate, Wheat Gluten, Fish Oil, Calcium Carbonate, Potassium Chloride, Fructooligosaccharides, Salt, Taurine, Potassium Citrate, L-Lysine, Vitamins [Dl-Alpha Tocopherol Acetate (Source of Vitamin E), Inositol, Niacin Supplement, L-Ascorbyl-2-Polyphosphate (Source of Vitamin C), D-Calcium Pantothenate, Biotin, Pyridoxine Hydrochloride (Vitamin B6), Riboflavin Supplement, Thiamine Mononitrate (Vitamin B1), Vitamin A Acetate, Folic Acid, Vitamin B12 Supplement, Vitamin D3 Supplement], Choline Chloride, Trace Minerals [Zinc Proteinate, Zinc Oxide, Ferrous Sulfate, Manganese Proteinate, Manganous Oxide, Copper Sulfate, Calcium Iodate, Sodium Selenite, Copper Proteinate], L-Carnitine, Marigold Extract (Tagetes Erecta L.) Rosemary Extract, Preserved with Mixed Tocopherols and Citric Acid.

Caloric Content

3,718 kcal/kg, 338 kcal/cup

Guaranteed Analysis
Crude Protein 18.0% min
Crude Fat 13.0% min
Crude Fiber 3.1% max
Moisture 10.0% max
Cystine 0.3.0% min
Methionine 0.45% min

Feeding Instructions

Weight Tendency to Become Overweight Daily Feeding (cup) Ideal Weight Daily Feeding (cup)
4.4 lbs 1/2 1/2
6.6 lbs 5/8 3/4
8.8 lbs 3/4 7/8
11 lbs 7/8 1
15 lbs 1 1/8 1 1/2
22 lbs 1 1/2 1 3/4
33 lbs 2 2 3/8
44 lbs 2 1/2 2 7/8
55 lbs 3 3 3/8
66 lbs 3 3/8 3 7/8
77 lbs 3 3/4 4 3/8
88 lbs 4 1/4 4 7/8
99 lbs 4 5/8 5 3/8
110 lbs 5 5 3/4
132 lbs 5 3/4 6 5/8

Ensure fresh drinking water is available at all times.

Store this product is a cool, dry place.

Transition Instructions

We recommend at least a 7 day transition before you begin feeding the new food exclusively. Start by mixing 75% of the old diet with 25% of the new diet on Day 1 and Day 2. On Day 3 and Day 4, mix 50% of the old diet with 50% of the new diet. On Day 5 and Day 6, mix 25% of the old diet with 75% of the new diet. On the 7th day, you can feed the new food exclusively. This allows your pet’s digestive system to smoothly adapt to the new food.

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Customer Reviews

41 reviews 41 Reviews 4.8 out of 5 Stars

98% Recommend

98% of reviewersrecommend this product

4.8 / 5

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  • Chewy has the best customer service

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    My dog had emergency surgery to remove lots of terrible urate stones, he was prescribed this food, he loves it and so far so good, it's a stressful situation all around and I'm so grateful for Chewy's fantastic customer service and reliable delivery straight to my door.

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  • Amazing Product

    By on

    My dog has urate stones and recently had to have surgery to get them removed. We tried other prescription dog foods but every meal time became a battle trying to get him to eat. I started looking for other prescription foods and found this amazing food. My dog loves it! In fact if I'm late feeding him he'll pester me just to make sure I remember that it's meal time. I definitely recommend this to anyone who needs this kind of prescription dog food.

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  • Hooray for RX Dog Food

    By on

    Recently found out our Lab has a rare Kidney disorder. Thank goodness for this prescription dog food, formulated by Royal Canin. It's helping to save our best friends life!!! He seems to enjoy the taste, so that is a big hurdle avoided, he eats it right up. And a HUGE thank you to Your staff is AMAZING!!!

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  • Low Purine Dog Food

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    I recently adopted a 5 year old male Dalmatian. Knowing Dals are prone to bladder stones, I had his urine checked and found out he had crystals in his urine. After a bladder ultrasound which came back negative for any stones, my vet recommended this low purine diet to help prevent any stones from forming. I had another male before, that also had a history of stones, so I was familiar with the protocol. My Dal just loves the food, he eats it all up.

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  • Dog Loves It

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    Our pup loooves this food! We had to put him on it after some bladder stone issues. He does eat more than it says to feed him though. He's still hungry after his serving and because he does not have obesity issues we do feed him more. I estimate that this bag will last about 3 weeks for our 95lb pup.

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  • Appealing food

    By on

    I have 2 mini schnauzers, one had 7 bladder stones removed when he was only 2.5 yeras old so our vet put him on Science Diet UC but he would balk at eating it so we tried the Royal Canin and he eats it just fine.

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  • Better than his other food

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    My dog is required to have this food as a result of cystic bladder stones. It makes him pee a whole lot more (that's what it does) and he farts a whole lot more(side effect). He enjoys eating it as much as he did his other food and this is cheaper than the food we were buying him.

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  • Great help and support

    By on

    Thank you very much for your great care of my pet, who is very happy to have his favorite food back!!!!!!

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  • Dalmatians

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    My dogs love this and I feel it's the best for them

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  • Arrived Fast

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    Just what I needed and arrived the next day! That's fast!

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