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Royal Canin Size Health Nutrition Medium Aging 10+ Dry Dog Food, 30-lb bag
Royal Canin

Size Health Nutrition Medium Aging 10+ Dry Dog Food, 30-lb bag

Evidence Fair
AAFCO compliance inferred from product name
dry $3.67/lb

Royal Canin Size Health Nutrition Medium Aging 10+ Dry Dog Food, 30-lb bag earns a Sniff Score of 63/100 (B) with Fair evidence. Zero controversial ingredients flagged. Quality carbohydrate sources with fermentable fiber..

Graded by The Sniff System

Why this score

Quality carbohydrate sources with fermentable fiber.

CQI

Quality fat sources: named fat with marine oil (EPA and DHA source).

FQI

AAFCO feeding trial substantiation for adult maintenance.

ACF

Plant-protein-dominated formula. brewers rice as the #1 ingredient.

PQI

Controversial ingredients · 1

  • sodium selenite
    Synthetic selenium source. Selenium is essential, but sodium selenite has a narrower safety margin than organic alternatives like selenium yeast. Better-formulated foods use the organic form.

Every flagged ingredient has a published basis (confirmed harm / regulatory action / precautionary). See methodology →

Guaranteed analysis
Dry-matter protein: 27% ⓘ
Protein
24%
min (as fed)
Fat
12%
min (as fed)
Fiber
3.6%
max (as fed)
Moisture
10%
max
Ingredients

Read why each ingredient is good or bad for dogs.

41 total
Good Neutral Watch Flagged
  1. 1
    brewers 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.

  2. 2
    chicken by-product meal

    Ground organs, bone, and tissue. Nutritionally dense, especially the liver and gizzard fractions. Named species ('chicken') is what matters. Generic 'poultry by-product meal' is the one to worry about.

  3. 3
    corn gluten meal

    Concentrated corn protein. Inflates the protein percent on the label without matching meat-quality amino acids.

  4. 4
    wheat

    Whole wheat. Fine for most dogs, though a portion are sensitive. Not a quality concern, just a fit-for-your-dog question.

  5. 5
    chicken fat

    Despite the name, a high-quality energy source. Concentrated calories plus essential fatty acids like linoleic acid.

  6. 6
    natural flavors

    Same as natural flavor. Usually hydrolyzed liver or broth, adds palatability.

  7. 7
    dried plain beet pulp

    Beet fiber, with the sugar removed. Long unfairly maligned. It's a real soluble fiber that supports stool quality.

  8. 8
    brown rice

    Whole grain that's easy to digest. Steady carb energy plus a little fiber.

  9. 9
    corn

    Whole corn is more nutritious than it gets credit for, with decent amino acids and steady carbs. The bigger concern is when corn dominates the top of the ingredient list at the expense of named meat.

  10. 10
    wheat gluten

    Concentrated wheat protein. Like other plant gluten meals, it pads the protein number on the label without contributing meat-quality amino acids.

  11. 11
    fish oil

    Concentrated omega-3s. The reason 'EPA' and 'DHA' get to show up on the bag.

  12. 12
    dried tomato pomace

    The fiber-rich byproduct of tomato processing. Sometimes flagged unfairly. It's a real fiber source, not a filler shortcut.

  13. 13
    vegetable oil

    Unnamed plant oil. Could be soy, canola, corn, or a blend. Named oils like sunflower or canola are more transparent.

  14. 14
    psyllium seed husk

    Soluble fiber. Supports stool quality. The same fiber humans use for digestive regularity.

  15. 15
    potassium chloride

    Required mineral. Sometimes used as a salt substitute. Standard inclusion in complete diets.

  16. 16
    salt

    Sodium chloride. Required at small doses for normal physiology. Not a quality concern in standard amounts.

  17. 17
    calcium carbonate

    Source of calcium. Functional. Required in complete dog foods, especially those without bone-in meat meals.

  18. 18
    fructooligosaccharides

    Prebiotic fiber, often called FOS. Feeds beneficial gut bacteria, similar in function to inulin.

  19. 19
    hydrolyzed yeast

    Yeast broken down with enzymes. Strong palatant plus a real source of B vitamins and amino acids.

  20. 20
    choline chloride

    Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.

  21. 21
    l-tryptophan

    Essential amino acid. Sometimes added in calming or weight-management formulas.

  22. 22
    glucosamine hydrochloride

    Joint-support compound. Most useful in larger doses for older dogs. The kibble dose is real but modest.

  23. 23
    taurine

    Amino acid critical for heart health. Especially important in grain-free or pulse-heavy formulas where natural taurine precursors run thin.

  24. 24
    zinc proteinate

    Zinc bound to protein for better absorption. The premium form of the mineral, versus zinc oxide which sits cheaper on the label.

  25. 25
    zinc oxide

    Inorganic zinc. Cheapest mineral form on the market. Functional but less bioavailable than chelated alternatives.

Showing first 25 of 41. Position 1-5 has the largest weight in the recipe.

25 of 25 ingredients have a curated note. Coverage grows over time.