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

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16-lb bag
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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!

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
  • Brand
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Prescription Food

Nutritional Info


  1. 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

  1. 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

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Customer Reviews

Purina Pro Plan Veterinary Diets UR St/Ox Urinary Formula Dry Cat Food is rated 4.8 out of 5 by 125.
Rated 5 out of 5 by from Meowarvelous! My neutered male kitty has had trouble with those pesky (and dangerous) urinary crystals several times in his short lifetime. Previous vet only prescribed meds. Took him to new vet this last time...who prescribed meds AND a change in food. The vet recommended a diet of both the dry and canned variety of Purina Veterinary Diets UR St/Ox Urinary Formula. My boy absolutely can't get enough of the canned, and also enjoys the dry. In other brands, by the time the bag reaches bottom, he's not all that into the flavor. With Purina Veterinary Diets UR St/Ox Urinary Formula, it seems to stay fresh for the entire bag. Improved packaging? Better quality food? Whatever it is, it works. This food does make him want to drink more, which is what they need if prone to urinary crystals. Also seems to really keep his stool firm and regular. All in all, I definitely think this food has improved his urinary health - plus he thinks it's delicious!
Date published: 2013-10-14
Rated 5 out of 5 by from Saved my cat My cat did not eat any prescription cat food for urinary issues yes struvite crystals I tried hills CD into flavors I also tried Royal Canaan and all the flavors he would not touch any of it he lost a lot of weight tried a bunch of holistic foods all kinds of stuff but this food literally was the only one he will eat thank God for Purina
Date published: 2017-02-13
Rated 5 out of 5 by from Great for preventing urinary tract infections This product has been used by our cat for 13 years to alleviate urinary tract issues. It has worked very successfully.
Date published: 2016-12-24
Rated 5 out of 5 by from This was eaten! Success! Neither the Hills or the Science Plan prescription dry foods were satisfactory for my two. My boy has been in and out of hospital with Struvite crystals and the food they gave me prescriptions for he didn't like and lost a lot of weight in the following weeks. As a big boy (Norwegian Forest Cat) thats a big deal. Then someone told me that Purina did a prescription food and as they were already on a Purina food I thought I'd try. He's regained the weight within a couple of weeks and is happily chomping, and so is his sister. Now, I haven't had him rechecked yet so I have no idea if this is having an effect on the crystals but so far he hasn't had a recurrance so thats positive.
Date published: 2016-10-09
Rated 5 out of 5 by from First time customer Recommend by a friend who loves the site and products. My cat requires prescription dry food and I ordered it here. They had to send a request to my vet for the rx which I thought I would have to wait for. My order shipped and delivered a few days later with no further action from me. They also give the option to take a picture of the rx label. Extremely fast and auto shipping is convenient for necessary reorder. Very pleased so far!
Date published: 2017-01-19
Rated 5 out of 5 by from Great Product! My 16 year old cat has urinary issues. My vet recommended this dry formula for her. It is very palpable and my kitty loves it! She gobbles it right up and never has any issues.
Date published: 2016-11-27
Rated 5 out of 5 by from Both cats love it My vet put my male cat on this food and the can wet food. He got blocked twice. Then a third, I the vet preformed a operation to basicly make him Pee like a female. Been on this food ever since Aug. 2016 Love the service of chewy auto order
Date published: 2017-01-20
Rated 5 out of 5 by from Have Relied on This for Years This brand has been our go to ever since our vet recommended it to us. It's helped our cats stay healthy for the last 10 years. We wouldn't ever switch to anything else. Love the quick and easy service that chewy.com provides! Thanks much!
Date published: 2017-03-15
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