Veterinary Diets UR Urinary St/Ox Dry Cat Food
Verified Jun 7, 2026
This is a prescription dry diet designed for adult cats with urinary tract concerns. It uses corn and rice as the main carbohydrate sources, with poultry by-product meal and tuna providing most of the protein, and is formulated to help manage urinary mineral balance. The recipe is complete and balanced for adult maintenance and has been validated through AAFCO feeding trials.
Nutritionally, this is a well-designed therapeutic urinary diet for adult cats, backed by feeding trials and formulated to support appropriate mineral levels for the urinary tract. The protein level is high for a dry food, and the controlled magnesium, calcium, and phosphorus are appropriate features in a urinary formula. It’s best suited for cats who specifically need a urinary prescription diet under veterinary guidance, rather than as a general everyday food for healthy cats.
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At a Glance
KibbleLab Review
Strengths
- Backed by AAFCO feeding trials for adult maintenance, which supports good overall digestibility and nutrient availability.
- High protein content for a dry food (40% as-fed) from poultry by-product meal and tuna, providing complete amino acid nutrition for cats.
- Formulated with controlled levels of magnesium, calcium, and phosphorus, which is appropriate in a urinary-support diet.
- Includes added taurine, fish oil, L-carnitine, and a full vitamin/mineral supplement blend for comprehensive nutrition.
Considerations
- Contains common protein allergens such as poultry by-products, tuna (fish), and soy ingredients, so it may not suit cats with known sensitivities to these proteins.
- Relies on plant-based protein sources like corn protein meal and soy protein isolate alongside animal protein, which some very active or muscle-wasted cats may not utilize quite as efficiently as higher proportions of animal protein.
- This is a therapeutic, prescription diet intended for urinary issues and should be used under veterinary supervision rather than rotated casually with regular maintenance foods.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Corn Protein
Corn protein is a plant-derived concentrated protein (often from corn gluten meal or corn protein isolate) used in dry pet foods to increase crude protein content and aid kibble texture; it supplies digestible plant-based amino acids but is lower in certain essential amino acids, particularly lysine, compared with animal proteins. It is an economical and sustainable ingredient but should be balanced with complementary animal proteins or supplemented amino acids—especially for cats, which need high-quality animal-based protein—and some pets can be sensitive or allergic to corn.
02
Poultry By-Product
Poultry by-product is used primarily as a concentrated protein, fat and micronutrient source in pet foods and consists of rendered poultry parts such as internal organs, bones and connective tissues that supply amino acids, minerals (notably calcium and phosphorus) and B‑vitamins. It can be a cost‑effective source of bioavailable nutrients, but composition and quality vary by source and processing—owners of pets with poultry allergies or who prefer named-meat ingredients may choose alternatives, and safety depends on reputable rendering and adherence to regulatory standards.
03
Rice
Rice is a common carbohydrate source and binder in dog and cat foods, supplying readily digestible energy and often used in formulations for sensitive stomachs or hypoallergenic diets. White rice is gentle and easy to digest while brown rice provides more fiber and micronutrients, but rice is low in essential amino acids, has a relatively high glycemic index, and can accumulate trace arsenic, so it should not be relied on as a primary protein and portions should be considered for diabetic or weight‑management pets.
04
Tuna
Tuna is commonly used in pet foods as a highly palatable animal protein and flavor enhancer, providing readily digestible protein and omega‑3 fatty acids (EPA/DHA) along with B vitamins for both dogs and cats. While nutritionally beneficial, tuna can be high in mercury or sodium (especially canned), and feeding it exclusively or frequently may cause nutrient imbalances (including risks for thiamine or taurine issues in cats), so it should be offered in moderation as part of a complete, balanced diet.
05
Oat Fiber
Oat fiber is used in pet foods primarily as an insoluble dietary fiber and bulking/texturizing ingredient to improve kibble structure, increase stool bulk, and promote feelings of fullness. It is generally well tolerated by dogs and cats and can support healthy digestion and weight management, but provides little protein or fat and in high amounts may dilute nutrient density or affect stool consistency, so formulations should be balanced and pets with rare oat sensitivities or cross‑contamination concerns monitored.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
AAFCO Nutritional Adequacy
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional
adequacy standards US pet foods are measured against.
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional adequacy standards US pet foods are measured against.Brand
Purina Pro Plan is Nestlé Purina’s flagship veterinary- and research-backed premium line, designed for pets with specific dietary needs and active lifestyles. It is supported by extensive nutritional science and AAFCO feeding trials.
Visit Purina Pro PlanWSAVA publishes criteria for evaluating a manufacturer (qualified nutritionists, feeding trials, published research); it does not certify or endorse brands.
Manufacturer
Nestlé Purina operates its own manufacturing facilities in the United States and globally with rigorous quality assurance programs. Facilities comply with FDA and USDA standards and implement HACCP-based food safety systems. The company conducts AAFCO feeding trials and employs board-certified veterinary nutritionists.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Purina Pro Plan Veterinary Diets UR Urinary St/Ox Dry Cat Food has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Purina Pro Plan ever been recalled?
We have no recalls on record for Purina Pro Plan. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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