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.

This product requires a veterinary prescription. Simply provide your vet's information during checkout and we'll follow up to confirm the prescription, or email a copy of your prescription to rx@chewy.com and we'll get your order out right away.

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.

Customer Reviews

172 reviews 172 Reviews 4.8 out of 5 Stars

99% Recommend

99% of reviewersrecommend this product

4.8 / 5

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  • no more dying kitty

    By on

    as soon as i gave my sick cat a bowl of this food , this picky eater gobbled it up. he loves the taste too. even thouigh quite expensive, it is worth it. it cuts cdown on my cat getting near death and having to pay for the vet every few months. also, it was delivered by the next morning! would recommend.

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  • RX Urinary cat food

    By on

    I am brand new to Chewy.com. My cat must have this food or he will not be able to tinkle. I have tried other urinary foods and he refuses to eat them. This food he will eat and seems to like. It is pricey but it does the trick. To help make it last, I mix this food with regular (cheaper) dry food.

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  • Try autoship!

    By on

    I think I will really love the auto-ship on this product. Many times my vet is out of this food, so now I am getting it delivered for the same price!!! I've never done auto-ship for anything. The best part is you can adjust your ship dates at any time. That is what sold me in trying it.

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  • Easy to get in the size you want

    By on

    Both my cats are on this food, however my vet's office manager is always running out or waiting for the order to come in. It's so frustrating to drive over only to be told to come back in 3 more days. Love that Chewy can schedule a delivery when my cats need it. This food has kept my cats healthy and free from urinary track issues. They love the taste so are not finicky about it.

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  • Fussy cats

    By on

    This is the only prescription dry cat food my cats will eat. Tried royal canon, hills, etc.. I highly recommend this dry food for your special kitty! Also.... can't beat the customer service at chewy!!! They respond super fast to any questions you might have. A++++

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  • FleeB loves his UR Food

    By on

    My little FleeB spent 10 days at the Vet for a urinary infection caused by feeding him commercial food. Buying the food through the vets office was rather costly - and then I found Chewy.com. Buying the dry and canned food through Chewy.com saved me over $30. Chewy is now my go to place for ordering anything cat related!

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  • Speedy delivery

    By on

    My cat was recently prescribed UR food after having kidney stones removed. I ran out of the supply that I purchased from the vet, and rather than driving all the way there, I was pleased to see a good price for the product from an online source. The best part for me was that Chewy checked with my vet for the prescription promptly, and it only took about a day until it arrived at my door!

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  • You done good

    By on

    Thanks for your service. You contacted our vet & cleared our Rx without any help from us. We got our order within 3 days with a nice discount on our 1st order. Thanks Chewy. PS. Happy Valentine's day!

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  • Great product

    By on

    My cat has been on this food for over 3 years without any urinary issues. Prior to starting the food he had multiple blockages within a 2-year span. High quality product, my cat loves the flavor.

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  • Great product!!

    By on

    I have been buying this product for years my cats absolutely love this!! I was getting from my vets office, it would take a week to get my product and I had to pick it up myself. I was shocked to see it on chewy and at a better price, with auto ship no more calling the vets office and waiting a week!! It shows up at my door monthly and I do not have to pick it up!! Love it!!

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