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

By Purina Pro Plan Veterinary Diets
Rated 4.5138 out of 5 stars
Veterinary Diet Item


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$89.99Chewy Price
$85.49Autoship Price
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About This Item


  • Great-tasting dry cat food for urinary health.
  • Crafted in collaboration with nutritionists, researchers and veterinarians.
  • Specially formulated to help reduce the risk of urinary stone formation in cats.
  • Features high-quality protein and promotes increased urine volume for dilution.
  • Developed to help dissolve existing struvite stones while preventing both new stones and calcium oxalate crystals from forming in the future.

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Nutritional Information

Feeding Instructions


Play Video: Learn More About Purina Pro Plan Veterinary Diets From Our Team of Experts
Learn More About Purina Pro Plan Veterinary Diets From Our Team of Experts

Frequently Bought Together

This Item – Purina Pro Plan Veterinary Diets UR St/Ox Urinary Dry Cat Food, 16-lb bag
Rated 4.5138 out of 5 stars
$89.99Chewy Price

Save Extra 40% with Autoship

Purina Pro Plan Veterinary Diets UR Urinary St/Ox Savory Selects Variety Pack Wet Cat Food, 5.5-oz, case of 24
Rated 4.3778 out of 5 stars
$64.99Chewy Price

Save Extra 40% with Autoship

Purina Pro Plan Veterinary Diets Urinary Health Crunchy Cat Treats, 1.8-oz bag
Rated 4.4278 out of 5 stars
$6.49Chewy Price

Save Extra 40% with Autoship

Total Price: $161.47

About Purina Pro Plan Veterinary Diet Urinary 

Advanced Urinary Support

Purina Pro Plan Veterinary Diets UR Urinary St/Ox feline formulas are formulated to help reduce the risk of urinary stone formation. Made with high-quality ingredients, these veterinary diet recipes are available in several flavor and texture varieties to help you find your kitty’s favorites.

Great Taste and Texture

Made with the specific nutrition your cat needs, in flavors and textures that help ensure adequate nutrient intake.

Made by Experts

Science-based recipes developed by a collaborative network of scientists, veterinarians and nutritionists.

Exceptional Quality

In a typical day, Purina conducts 100,000+ quality checks on ingredients, processing, packaging, packing and receiving.

Responsible Sourcing

Each ingredient can be traced back to its trusted supplier, so quality may be evaluated all the way back to the source.

About Purina Pro Plan Veterinary Diets

Purina Pro Plan Veterinary Diets is committed to the health of every pet, especially those with unique nutritional needs. Established through decades of research and supported by a global network of scientists, each recipe is formulated to deliver advanced nutrition for your pet. For innovative therapeutic products trusted by pet owners and veterinary professionals alike, you can always count on Purina Pro Plan.

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Food FlavorPoultry, ChickenPoultry, ChickenSeafood & Fish, TunaSeafood & FishPoultry, Chicken
Health FeatureUrinary Tract HealthDiabetic SupportKidney CareKidney CareDigestive Health
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Questions & Answers

23 Customer Questions

how do I remove this item from my cart?
Answer by DaniSep 16, 2022
go to your card a tap remove or you can change the quantity to "0".

I have other (Healthy) cats in my household , is it okay if they eat this also. Only one cat has UR issues.
Answer by ChewyOct 30, 2018
Purina states that Animal feeding tests using AAFCO procedures substantiate that Purina Pro Plan Veterinary Diets UR Urinary St/Ox Feline Formula provides complete and balanced nutrition for maintenance of adult cats. This diet is formulated to meet the nutritional levels established by the AAFCO Cat Food Nutrient Profiles for maintenance of adult cats. With that said, this diet should not harm your healthy cats, but you should check with your vet for any particular feeding guideline or specific health concerns.

What is the percentage of moisture in this dry food?
Answer by ChewySep 01, 2020
This food has 122% moisture.

What flavor is this bag?
Answer by ChewyNov 15, 2017
This product's main flavor is chicken.

ReviewsWrite a Review

Rated 4.5138 out of 5 stars
545 Ratings
Would recommend to a friend

533 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 2 out of 5 stars
By Laura on Nov 19, 2023

Essential, but unliked by cat

My poor older male cat has developed urine crystals, which require special food to break them down. Vet has to prescribe, so it's very expensive. Which would not be a problem, if Max liked and ate it! I know it's very important he eats this, but after 2 bites, he refuses. I have begun slowly introducing it into his regular kibble, but still no success. Wish it could be made tastier, or at least offer variety of flavours.

Rated 1 out of 5 stars
By Michelle on Nov 11, 2023

Change I'm formula bad for my cat

I got a new bag about a month ago and my cat was throwing it up anytime he ate it. I thought it was a bad batch so got a replacement through chewy. Got a smaller bag from the vet with the same packaging. He barely eats it and is still throwing up. I brought him to the vet to find out he has a uti and inflamed blader. BUYER BEWARE!!! This new packaging with the black on it is not good. The all white one was the best. Ever since they changed I'm going to have to go to a different urinary brand.

Rated 5 out of 5 stars
By Joyce on Dec 1, 2023

My Snow loves it

I'm so glad I bought this because she devours this food. The other brand her previous owner got me I had to mix a bit of tuna in order for her to eat it and by the end of the day it's still there. This one I don't have to worry because by the time I get home it's all gone.

Rated 2 out of 5 stars
By Ruth on Nov 23, 2023

Damaged food in box

When I opened the Chewy box, there was nothing securing the food in place (paper, tissue paper, foam etc.) so a handful of cans were bent open deform the shipping process which leaked all over the other cans.

Rated 5 out of 5 stars
By Sandra on Nov 3, 2023

Great Product!

My cat Beans was put on this prescription food due to crystals in his urine. It has since cleared but will have to remain on this special food for the remainder of his life. He did get tired of of it so now i have to mix it with the Hills c/d prescription food The only drawback is that it is very expensive. But he is worth it.

Rated 5 out of 5 stars
By ChloeKitty on Sep 26, 2023

My kitty was ill with MAP Crystals. It was scary and devastating for both of us. She was put on a strict diet to prevent the crystals from forming. Just like her human counterparts, she refused to eat the prescribed selection of foods. She did not recognize it as “her food”, so she walked away from it. Finally, I ordered Purina Pro Plan Urinary St/Ox and I am happy to report she eats it and loves it. I have regained peace of mind over my Chloe’s diet to dissolve MAP Crystals. Thank you Purina Pro Plan. Vicki & Chloe

Rated 5 out of 5 stars
By SHEILA on Nov 7, 2023


We have a cat that refuses to eat anything but seafood flavor dry food. So when told he needed to eat this special cat food for urinary problems I didn't hold out much luck that we could get him to heat it. HE LOVED IT FROM DAY 1! And feeling much better now.

Rated 3 out of 5 stars
By Linda on Nov 21, 2023

Bad expiration date

I am very disappointed at the expiration date on my cat's prescription cat food. The bag I received from the vet two months ago expires 8/2024. The bag I just received from Chewy has a 6/2024.

Rated 5 out of 5 stars
By TC on Aug 24, 2023

Great for cat with FLUTD

My boys have been eating this food for, something like, 9 years. One cat has feline lower urinary tract disease and my other doesn’t. They both love the food and it makes them thirsty so they drink more water; water intake is even more imperative for male cats. They were out of this food for a week and the water intake was dramatically less. A special shout out to Chewy here. I usually call in my order to my veterinarian, they order the food, and it arrives within a week. After 2 weeks of waiting- my vet never actually ordered the food. They gave me a prescription to add and order here through Chewy. It was only my second Chewy order ever and the customer service was top-notch. Some of the best I’ve ever received with an online company.

Rated 1 out of 5 stars
By Autumn on Oct 19, 2023

Formula Changed after 5+ years

Our cats have been on this food and healthy and happy for 5+ years. Now they are vomiting and dehydrated and refusing to eat. We thought they were all mysterious sick but turns out it's the change in formula. This is dangerous for a manufacturer to do. I contacted Purina and no response. Not happy at all, we are in process of finding new medical food option for crystals .