Purina Pro Plan Veterinary Diets UR St/Ox Urinary Formula Dry Cat Food

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16-lb bag
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This prescription item requires vet approval. Details


Formulated to support renal health, Purina Pro Plan Veterinary Diets UR Urinary ST/OX Feline Formula is uniquely balanced to promote increased urine volume and water intake while delivering the optimal nutrition that adult cats need. It offers dietary benefits that provide optimal nutrition while meeting your adult cat's special needs.

Key Benefits

  • Feline Lower Urinary Tract Disease (FLUTD) is a common condition among cats of any age, but found most often in middle-aged, over-weight cats that eat a diet primarily of dry food.
  • Purina Pro Plan Veterinary Diets UR Savory Selects Urinary St/Ox has been specifically formulated to meet the dietary needs of adult cats that are predisposed to lower urinary tract conditions. It encourages an increase in water consumption and urine volume.
  • It promotes a urinary environment unfavorable for developing struvite and calcium oxalate crystals and a healthy urine acidity level.
  • Designed for cats with lower urinary tract disease, sterile struvite stones, a history of calcium oxalate stones, or idiopathic cystitis.
  • Made in the USA!

Additional Details

Use only as directed by your veterinarian. Product not intended for ruminants or livestock.

Note: Purina Pro Plan 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 rx@chewy.com.

See all items by Purina Pro Plan Veterinary Diets

  • Item Number
  • Weight
    16.0 pounds
  • Brand
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


Corn Gluten Meal, Chicken, Poultry By-Product Meal, Brewers Rice, Oat Fiber, Wheat Gluten, Whole Grain Corn, Animal Fat Preserved with Mixed-Tocopherols (Form of Vitamin E), Salt, Animal Liver Flavor, Phosphoric Acid, Dried Egg Product, Calcium Carbonate, Potassium Chloride, Fish Oil, Choline Chloride, Taurine, Zinc Sulfate, Vitamin E Supplement, Ferrous Sulfate, Manganese Sulfate, Niacin, Vitamin A Supplement, Calcium Pantothenate, Thiamine Mononitrate, Copper Sulfate, Riboflavin Supplement, Vitamin B-12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D-3 Supplement, Calcium Iodate, Biotin, Menadione Sodium Bisulfite Complex (Source of Vitamin K Activity), Sodium Selenite.

Caloric Content

3,853 kcal/kg, 403 kcal/cup

Guaranteed Analysis
Crude Protein 40.0% min
Crude Fat 11.0% min
Crude Fiber 4.0% max
Moisture 12.0% max
Ash 9.5% max
Calcium 0.9% min
Phosphorus 0.8% min
Magnesium 0.09 mg max

Feeding Instructions

The following feeding program is recommended as a guideline only, with discretionary clinical adjustments for proper weight maintenance.

Weight Adult Maintenance Daily Feeding (cup)
3 - 5 lbs 1/4 - 1/3
6 - 8 lbs 1/3 - 1/2
9 - 12 lbs 1/2 - 3/4
13 - 16 lbs 3/4 - 1
17 - 20 lbs 1 - 1 1/3
21 - 25 lbs 1 1/3 - 1 2/3

Provide adequate fresh water in a clean container for your dog daily. For your pet’s health, see your veterinarian regularly.

Transition Instructions

With your veterinarian’s approval, offer increasing amounts of the new food with decreasing amounts of the old food.

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Customer Reviews

156 reviews 156 Reviews 4.8 out of 5 Stars

99% Recommend

99% of reviewersrecommend this product

4.8 / 5

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  • Great first experience

    By on

    I ordered this product from Chewy because it was cheaper than my Vet and Chewy was the first place that I had found where I could purchase the product from someone other than a VET. The product was exactly as advertised, Chewy handled getting the prescription approved and shipped as I was told. I was so impressed that I set up auto-ship for this product every 8 weeks from Chewy. I would recommend Chewy to anyone for their pet's needs.

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  • Great deal

    By on

    My cats have been on this prescription diet over a year now. I've spent well over a thousand dollars on food alone, buying it from my vet and ordering it via internet. Chewy has the best price I've ever seen and fast service. I ordered, emailed and faxed my prescription, and received my order all in less than 48 hours. This is my first time ordering, but I'm very impressed so far. Thank you Chewy.

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  • Great service

    By on

    Ordered my prescription cat food and had it within a few days. Chewy contacted our vet to confirm my cat's prescription for special dry food for Urinary formula and I was able to schedule a delivery for every 2 months at a lower price than I was getting it for at my vet's office.

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  • My large 20 lb Maine Coon

    By on

    Well we had to buy this for our oldest cat in the house. And have found out that we have to feed him by himself. Because all of the cats in the house luv to eat this food. The 1 to 2 day shipping is phenomenal. Means that we can run almost completely out of food and having AutoShip, it's going to come to us we just got to adjust AutoShip time because this is our first time. So we're in the process now in starting our third bag. We will keep getting it. And maybe switch to this food 100% for all the furry children. P.S. We have to hide the food n keep it locked up. Because they eat through the bag n enjoy the whole bag.

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  • No More URINARY TRACT infections!

    By on

    A few years back, my male cat had a blockage that ended him in the Emergency Clinic. They didn't recommend any type of food he should be on, so in a few weeks, he had a few accidents. New vet: After a urinary exam, he recommended this food. I was freaked as my cats hate change (especially prescription food) but he dove into this food face first (obviously!) and has loved it ever since, and has NEVER had another problem. While it's a tad expensive on my budget, it's cheaper than the ER!!!!

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  • One happy cat family

    By on

    Great prices on cat food. Had to get this special diet.food. all cat lovers fear they will get food and none will eat it. Mine really like this dry food

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  • all is good

    By on

    everything was fine, product and shipping. it arrived in a big box full of paper and the cats are still enjoying the food and the paper.

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  • Good Service

    By on

    This food is hard to find at a cheap price. After looking around for a little while, Chewy.com was the cheapest place I found.

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  • Works Great!

    By on

    My 3yo, Aslow, had an ER trip a month ago due to urinary blockage...it was frightening and I'm so glad he made it through. My vet recommended this food to prevent future occurrences and Aslow absolutely loves it! It seems to have the desired effect (fingers crossed) as he has increased his water intake and produces urine freely and often. Each night, I throw a bite of canned chicken on top, as well as some low sodium chicken broth and Aslow is addicted!

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  • He loves it!

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    My cat has been eating this hard food for several years now. He loves it and always eats it all. He hasn't had a urinary issue since he switched to this diet. I give him wet food with this dry food. I do wish the dry food came in other flavors.

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