Selected Protein Potato & Duck Formula Loaf Adult Wet Dog Food, 13.5-oz can, case of 24
Graded by The Sniff System
Royal Canin Veterinary Diet Selected Protein Potato & Duck Formula Loaf is a wet food for adult dogs, featuring duck and duck liver as its primary proteins.
This formula includes quality carbohydrate sources with declared fiber, which is good for digestive health. It also uses quality fat sources, including named fat and fish oil, providing beneficial EPA and DHA. The food has AAFCO feeding trial substantiation for adult maintenance.
One thing to watch for is the inclusion of carrageenan, a seaweed-derived thickener. Some studies link it to gastrointestinal inflammation, and concern is elevated for dogs with IBD.
Good fit for adult dogs, especially those needing a limited ingredient diet. Less ideal if your dog has IBD or a sensitive stomach.
Summary written by The Sniff System from the data above. Same rubric, same drivers, expressed in English.
In its 2022 update on diet-associated DCM, the FDA identified Golden Retrievers as the most reported breed, with 121 cases out of 1,382 total canine reports (8.8%) received between January 1, 2014, and November 1, 2022 (FDA, 2022) . Good fit for active large sporting breeds, including the Golden Retriever, navigating diet-associated DCM concerns. Duck anchors position 2, with zero pulses in the top 15, plus added taurine at position 14 and duck liver at position 4 (a natural taurine precursor).
Looking at this for adult Golden Retrievers or Golden Retrievers with diet-associated DCM concerns ? 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.
- FDA, 2022cardiac · epidemiology · breed predisposition· cited in 5 claims
- FDA, 2019diet composition· cited in 2 claims
- NRC, 2006nutrient bioavailability
Every claim on Sniff traces to a source. If you find a citation that's wrong, outdated, or misapplied, tell us.
At 57/100, this formula lands mid-pack. The lift comes from carbohydrate quality, worth 13 points to the final number: Quality carbohydrate sources with declared fiber. Where it lost ground: controversial-ingredient penalty, costing 5 points. Contains carrageenan. Plausible rodent colitis mechanism, no direct canine clinical evidence at food-grade levels. Concern elevated for dogs with IBD. This formula sits 3.0 points below the B-tier line. The most direct lever is controversial-ingredient penalty.
Quality carbohydrate sources with declared fiber.
Quality fat sources: named fat with marine oil (EPA and DHA source).
AAFCO feeding trial substantiation for adult maintenance.
Contains carrageenan. Plausible rodent colitis mechanism, no direct canine clinical evidence at food-grade levels. Concern elevated for dogs with IBD..
- Bottom 2% for fat quality in Royal Canin Veterinary Diet's lineup (12/16)
- Top quartile for DMB fat in Royal Canin Veterinary Diet's lineup (20.0%)
- Bottom 2% for DMB protein in grain-free wet foods (22.9%)
Computed against the rest of our catalog. Percentiles refresh on each catalog update.
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Scores 5 points higher with a similar formulation profile.
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Chicken instead of duck, 1 point higher, different brand.
Surfaced from a vector similarity search across 3,491 scored dog foods. How this works.
Controversial ingredients · 1
- carrageenanSeaweed-derived thickener; some studies link it to gastrointestinal inflammation. Most common in wet foods but appears in some kibble gravies.
Every flagged ingredient has a published basis (confirmed harm / regulatory action / precautionary). See methodology →
Wet and fresh foods contain more water than kibble (typically 65-78%). On a dry-matter basis, this food's protein content is roughly 23%, comparable to premium kibble (typically 30-45% DMB protein).
Read why each ingredient is good or bad for dogs.
- 1water sufficient for processing
The regulatory phrase for cooking water in wet food. Has no nutritional implication, just labeling formality.
- 2protein animalduck
Real meat. Often used as a novel protein for dogs with sensitivities to chicken or beef.
Position 2: co-primary protein. Two named animal proteins in the top 2 is a strong protein build.
- 3vegetablepotato
Standard white potato. Steady carb source, common starch in grain-free recipes.
Position 3: meaningful whole-food inclusion. Source of vitamins, antioxidants, or natural fiber.
- 4protein animalduck liver
Position 4. Named organ meat this high is a strong build choice. Concentrated source of taurine, glutamine, and B-vitamins.
- 5dried potato
Standard white potato. Steady carb source, common starch in grain-free recipes.
- 6duck by-product meal
Position 6: supporting protein. Modest contribution to total protein weight.
- 7fiberpowdered cellulose
Plant fiber, often from wood pulp. Cheap bulk filler. Not harmful, but a tell that the recipe is reaching for inexpensive bulk.
Position 7: functional fiber for digestion or satiety.
- 8vegetable oil
Unnamed plant oil. Could be soy, canola, corn, or a blend. Named oils like sunflower or canola are more transparent.
Position 8: trace fat. Below the level that materially shifts the fat profile.
- 9fatfish oil
Concentrated omega-3s. The reason 'EPA' and 'DHA' get to show up on the bag.
Position 9. Moderate marine-oil inclusion. Supplements EPA/DHA without being the primary fat.
- 10othernatural flavors
Same as natural flavor. Usually hydrolyzed liver or broth, adds palatability.
- 11mineralsodium tripolyphosphate
Preservative and texture agent in wet food. Functional at small doses, not a major concern, but some brands avoid it.
- 12mineralcalcium carbonate
Source of calcium. Functional. Required in complete dog foods, especially those without bone-in meat meals.
- 13supplementcholine chloride
Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.
- 14supplementtaurine
Amino acid critical for heart health. Especially important in grain-free or pulse-heavy formulas where natural taurine precursors run thin.
- 15othercarrageenan Flagged
Seaweed-derived thickener. Some lab studies suggest gut inflammation, but the evidence in pets is mixed. See why →
- 16preservative naturalcitric acid
Natural antioxidant preservative. Helps keep fats from going rancid.
- 17sodium carbonate
pH buffer used in food processing. Functional, no quality signal.
- 18zinc oxide
Inorganic zinc. Cheapest mineral form on the market. Functional but less bioavailable than chelated alternatives.
- 19mineralferrous sulfate
Inorganic iron. Standard mineral source. Iron proteinate is the gentler, better-absorbed premium form.
- 20mineralzinc proteinate
Zinc bound to protein for better absorption. The premium form of the mineral, versus zinc oxide which sits cheaper on the label.
- 21mineralcopper sulfate
Inorganic copper. Standard, effective at small doses. Premium formulas tend to use copper proteinate instead.
- 22manganous oxide
Inorganic manganese. Functional, cheaper than chelated forms, less efficiently absorbed.
- 23mineralsodium selenite Flagged
Inorganic selenium. Effective at AAFCO levels, no documented safety concern in dogs despite what some pet food blogs claim. Selenium yeast is a marginal upgrade, not a necessity. See why →
- 24mineralcalcium iodate
Source of iodine for thyroid function. Functional, required in complete formulas.
- 25mineralmagnesium oxide
Inorganic magnesium. Functional at AAFCO doses, less efficiently absorbed than chelated forms.
Showing first 25 of 26. Position 1-5 has the largest weight in the recipe.
23 of 25 ingredients have a curated note. Coverage grows over time.