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!


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 (Cups)
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

148 reviews 148 Reviews 4.8 out of 5 Stars

99% Recommend

99% of reviewersrecommend this product

4.8 / 5
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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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  • 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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  • LINX loves his food

    By on

    This service helps me and my buddy LINX in two ways, 1st the larger size and the lower price saves us money, 2nd the home delivery keeps us from depending on others for transportation because I am a disabled wheelchair bound US Army veteran that depends on others for transportation. We do not need to worry about the local vet being out when LINX needs his food

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  • It saves lives!

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    My cat would literally die without this product. I am grateful to have found it and will enjoy more time with my cat because of it.

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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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  • Great food for Urinary problems for Cats

    By on

    My Cat began on blue buffalo and gained a lot of weight . He began to get infections till put onto this food which he likes.It is so wonderful to find it cheaper on CHEWY and they contacted the Vet for script.Thanks-CHEWY!

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  • Great food for Urinary stones

    By on

    This Pro Plan UR St Ox Urinary Formula Dry Cat Food works great for my Chloe. She has had stones (10) of them in fact removed a few years ago. She has to Eat this food so that she won't form more stones. She really likes this food and eats it every day. The bag was shipped out very quickly after my vet approved the prescription for this food, and I received it in 1 day.

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  • My cats don't jump for joy but do not run away either.

    By on

    Wanted something to change up from just the soft food. I would probably buy this product again.

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  • just what the doctor ordered ....

    By on

    My kitties love this 'health' food so when I found I could get a big bag delivered, I took advantage of the situation.

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