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Pro Plan Veterinary Diets 00038100175748 Check price on Amazon

Pro Plan Veterinary Diets Purina UR Urinary Ox/St Canine Formula Dog Food Dry Kibble - 25 lb. Bag Review

By Dr. Lena Ortiz · Canine wellness writer · Published 2026-05-15 · Updated 2026-06-22

4.6 (453) Amazon rating$113.99400+ bought last month

Our verdict

Purina Pro Plan Veterinary Diets UR Urinary Ox/St is the dry kibble version of Purina's urinary tract veterinary diet, sold in a 25 lb bag, and its 4.6 star average across 453 reviews suggests a solid track record among dogs managing urinary health.

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Best for

Dogs under veterinary care for urinary tract health who need a large bag of dry kibble for ongoing daily feeding.

Skip if

Your dog needs the added moisture of a wet food for urinary support, or you have not confirmed this specific formula with your vet.

  • Priced 39% above the category median ($81.99 across 50 tracked models)

Our scorecard

4.5/5 overall
  • Owner rating4.6/5

    4.6 average across 453 owner ratings

  • Popularity3.3/5

    453 owner reviews, more than most models here

The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog food and health supplements we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.

Overview

["This is the dry kibble version of Purina Pro Plan Veterinary Diets UR Urinary Ox/St, sold in a large 25 lb bag. It's part of Purina's veterinary diet lineup aimed at supporting urinary tract health in dogs, positioned by Purina as the Ox/St formula referenced in its name.", 'The 25 lb bag size points to this being formulated for longer-term daily feeding rather than a short trial, which fits how urinary tract diets are typically used once a vet has confirmed the diagnosis and diet plan. Detailed ingredient specs for this particular dry listing were not available at the time of this review.', "At $113.99 for 25 lb, it's priced for the larger bag format. With 453 reviews and a 4.6 star average, it holds up well within Purina's veterinary diet lineup, and about 400 units were bought in the past month, pointing to steady ongoing demand."]

Pros

  • Large 25 lb bag suits ongoing daily feeding
  • Strong 4.6 star average across 453 reviews
  • Steady recent demand with about 400 bought in the past month
  • Part of Purina's established Pro Plan Veterinary Diets lineup

Cons

  • Detailed ingredient and flavor specs were not available for this listing
  • Dry kibble only, no added moisture the way a wet food provides
  • Best suited to dogs with a confirmed urinary diagnosis rather than general use

Performance notes

As the dry kibble counterpart to Purina's canned UR Urinary Ox/St formula, this version is built for convenient, everyday feeding in a large bag size, which suits dogs on a longer-term urinary maintenance plan rather than a short course of care.

What buyers say

A 4.6 star average across 453 reviews, along with roughly 400 bought in the past month, points to consistent, established demand for this formula within Purina's veterinary diet range.

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Frequently asked questions

Is this the same formula as the canned UR Urinary Ox/St food?

It shares the UR Urinary Ox/St name and is part of the same Purina Pro Plan Veterinary Diets line, but this listing is the dry kibble format rather than canned, so texture and moisture content differ.

Do I need my vet to approve this diet?

Yes. This is a veterinary diet aimed at managing urinary tract health, so it should be used as part of a plan confirmed by your vet rather than chosen on your own.

Why is the bag size 25 lb?

The large bag size is meant for dogs on an ongoing urinary maintenance diet, since these formulas are typically fed long-term once a vet has confirmed the plan.

Best Overall  ·  All Veterinary Diet Dog Food

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