Multifunction Urinary SO + Hydrolyzed Protein Dry Dog Food, 7.7-lb bag
Graded by The Sniff System
Royal Canin Veterinary Diet Multifunction Urinary SO + Hydrolyzed Protein Dry Dog Food is a dry formula featuring hydrolyzed soy protein, designed for specific dietary needs.
This formula includes quality fat sources like chicken fat and fish oil, which provides beneficial EPA and DHA. It also features quality carbohydrate sources with fermentable fiber, such as dried chicory root. The product has AAFCO feeding trial substantiation, which is a strong indicator of nutritional adequacy.
The formula is plant-protein-dominated, with brewers rice as the first ingredient and hydrolyzed soy protein as the second. This means the primary protein sources are not animal-based.
Good fit for dogs with urinary issues or those needing hydrolyzed protein. Less ideal if you prefer a formula with animal-based protein as the primary source.
Summary written by The Sniff System from the data above. Same rubric, same drivers, expressed in English.
Good fit for active large sporting breeds, including the Labrador Retriever, navigating weight management. At 326 kcal/cup this formula runs on the lean side, with crude fiber at 4% (above the catalog median, supports satiety). The landmark 14-year Purina Lifespan Study on 48 Labrador Retrievers demonstrated that dogs fed 25% fewer calories lived a median of 1.8 years longer and delayed the onset of chronic diseases. According to the Association for Pet Obesity Prevention's 2023 survey, 59% of dogs in the United States were classified as overweight or obese by their veterinary healthcare professional, representing an estimated 55 million dogs (APOP, 2023) .
Looking at this for adult Labrador Retrievers or Labrador Retrievers with weight management ? We are building dedicated pages for these combinations.
Auto-matched from this product's measurements (ingredients, life stage, calorie density) to a breed archetype. Not a substitute for vet input on your specific dog.
Research informing this analysis
MethodologyThe Sniff System grades this product against 3 cited studies relevant to its profile. Each link opens the original source.
- Brooks et al., 2014diagnostic · protocol · satiety· cited in 5 claims
- APOP, 2023prevalence
- Raffan et al., 2016genetics
Every claim on Sniff traces to a source. If you find a citation that's wrong, outdated, or misapplied, tell us.
Middle-of-pack grade. 56/100 (C) reflects the structural fit of this formula against The Sniff System's eight scoring components. Fat quality did the heavy lifting (+12 points): Quality fat sources: named fat with marine oil (EPA and DHA source). What we'd flag for vet discussion: protein quality (-17 points). Plant-protein-dominated formula. brewers rice as the #1 ingredient. B-tier is 4.0 points away. Improving protein quality is the most direct route.
Quality fat sources: named fat with marine oil (EPA and DHA source).
Quality carbohydrate sources with fermentable fiber.
AAFCO feeding trial substantiation for not stated.
Plant-protein-dominated formula. brewers rice as the #1 ingredient.
- Bottom 2% for fat quality in Royal Canin Veterinary Diet's lineup (12/16)
- Bottom 4% for DMB protein in dry kibbles (20.1%)
- Bottom 10% for caloric density in dry kibbles (326 kcal/cup)
Computed against the rest of our catalog. Percentiles refresh on each catalog update.
Similar dog foods worth considering
Three lenses on products with formulation profiles similar to this one.
Royal Canin Veterinary Diet Multifunction Urinary SO + Satiety Dry Dog Food, 17.6-lb bag
Scores 2 points higher with a similar formulation profile.
Royal Canin Veterinary Diet Adult Urinary SO Aging 7+ Dry Dog Food, 26.5-lb bag
$5.06/lb vs your seed's $8.31/lb (39% less) at a comparable score.
Surfaced from a vector similarity search across 3,491 scored dog foods. How this works.
Read why each ingredient is good or bad for dogs.
- 1brewers rice
Broken rice kernels left over from milling, usually destined for human beer-making. Cheaper than whole or even white rice. Same carbs, less nutrition than the brown version. See why →
Position 1 grain: primary carbohydrate base. This is a grain-inclusive formula with brewers rice as the dominant carb.
- 2hydrolyzed soy protein
- 3fatchicken fat
Despite the name, a high-quality energy source. Concentrated calories plus essential fatty acids like linoleic acid. See why →
Position 3: primary fat source. Drives the formula's caloric density and omega-6 content.
- 4othernatural flavors
Same as natural flavor. Usually hydrolyzed liver or broth, adds palatability.
- 5fiberdried chicory root
Natural prebiotic. Feeds beneficial gut bacteria. The same compound (inulin) used in human gut-health products.
Position 5: functional fiber for digestion or satiety.
- 6mineralsalt
Sodium chloride. Required at small doses for normal physiology. Not a quality concern in standard amounts.
- 7vegetable oil
Unnamed plant oil. Could be soy, canola, corn, or a blend. Named oils like sunflower or canola are more transparent.
Position 7: trace fat. Below the level that materially shifts the fat profile.
- 8fiberpea fiber
Insoluble fiber from peas. Doesn't carry the protein-inflation concern of pea protein. Mostly there for stool quality.
Position 8. Moderate inclusion. Contributes carbohydrate and some plant protein.
- 9calcium sulfate
Source of calcium. Functional, required for AAFCO-complete formulas.
- 10fatfish oil
Concentrated omega-3s. The reason 'EPA' and 'DHA' get to show up on the bag.
Position 10. Moderate marine-oil inclusion. Supplements EPA/DHA without being the primary fat.
- 11mineralpotassium chloride
Required mineral. Sometimes used as a salt substitute. Standard inclusion in complete diets.
- 12sodium aluminosilicate
Anti-caking agent that keeps powder ingredients flowing. Functional, not nutritional.
- 13monocalcium phosphate
Source of calcium and phosphorus. Standard mineral inclusion in complete dog foods.
- 14fiberfructooligosaccharides
Prebiotic fiber, often called FOS. Feeds beneficial gut bacteria, similar in function to inulin.
Position 14: trace fiber inclusion.
- 15supplementcholine chloride
Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.
- 16supplementtaurine
Amino acid critical for heart health. Especially important in grain-free or pulse-heavy formulas where natural taurine precursors run thin.
- 17supplementdl-methionine
Essential amino acid. Often added when plant proteins dominate, since methionine is naturally lower in pulses than meat.
- 18n-butyric acid
- 19gla safflower oil
- 20marigold extract
- 21mineralzinc proteinate
Zinc bound to protein for better absorption. The premium form of the mineral, versus zinc oxide which sits cheaper on the label.
- 22zinc oxide
Inorganic zinc. Cheapest mineral form on the market. Functional but less bioavailable than chelated alternatives.
- 23mineralmanganese proteinate
Manganese bound to protein for better absorption. The chelated form most premium brands use.
- 24manganous oxide
Inorganic manganese. Functional, cheaper than chelated forms, less efficiently absorbed.
- 25mineralcopper sulfate
Inorganic copper. Standard, effective at small doses. Premium formulas tend to use copper proteinate instead.
Showing first 25 of 31. Position 1-5 has the largest weight in the recipe.
21 of 25 ingredients have a curated note. Coverage grows over time.