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Supreme Source Grain-Free Lamb & Potato Recipe Dry Dog Food, 22-lb bag
Supreme Source

Grain-Free Lamb & Potato Recipe Dry Dog Food, 22-lb bag

Evidence Fair
dry $1.82/lb

Graded by The Sniff System

In plain English

Supreme Source Grain-Free Lamb & Potato Recipe Dry Dog Food is a dry formula with lamb as its primary protein.

This formula includes quality fat sources like named chicken fat, and marine oil provides EPA and DHA. It also uses premium micronutrient forms, such as chelated minerals, which are easier for dogs to absorb.

The biggest watch item is the lack of an AAFCO statement, which means its nutritional completeness is unverified. Also, it contains high legume stacking with peas, chickpeas, and fava beans all appearing in the top ingredients.

Good fit for dogs whose owners prioritize quality fats and chelated minerals. Less ideal if you prefer AAFCO verification or lower legume content.

Summary written by The Sniff System from the data above. Same rubric, same drivers, expressed in English.

Who this is for

Good fit for adult Labrador Retrievers and similar active sporting breeds navigating weight management. Working in its favor: crude fiber (6.5%) helps satiety. At 374 kcal/cup this formula runs on the moderate side, with crude fiber at 6.5% (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. The 2014 AAHA Weight Management Guidelines define overweight as a Body Condition Score (BCS) of 6-7 on a 9-point scale. A score of 8 or 9 indicates obesity, representing 20-30% and >30% above ideal body weight, respectively  (Brooks et al., 2014) .

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

Methodology

The Sniff System grades this product against 3 cited studies relevant to its profile. Each link opens the original source.

Every claim on Sniff traces to a source. If you find a citation that's wrong, outdated, or misapplied, tell us.

Why this score

Middle-of-pack grade. 58/100 (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 capped it: the score can't exceed 59 because the AAFCO nutritional adequacy statement isn't disclosed on the retailer page (so our methodology can't verify the formula meets adult, growth, or all-life-stages standards). How it could climb: the brand publishing the AAFCO statement, which would lift the cap into B-band range.

What lifted the score

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

FQI

Premium micronutrient forms such as chelated minerals or natural vitamin E.

MNI
What pulled it down

Score capped at 59 due to no AAFCO statement.

CAP why?

No AAFCO statement. Nutritional completeness unverified.

ACF

Contains high legume stacking. Multiple pulse-family ingredients in top 15. Mitigated by taurine supplementation or organ meat (natural taurine precursor) in top 10..

CIP
What sets this apart
  • Bottom 10% for DMB fat in grain-free dry kibbles (12.2%)
  • Top quartile for crude fiber in grain-free dry kibbles (7.2% DMB)
  • Bottom quartile for caloric density in grain-free dry kibbles (374 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.

Better match
Higher score, similar formulation
Merrick Grain-Free Dry Dog Food Real Lamb & Sweet Potato Recipe, 4-lb bag
Merrick

Merrick Grain-Free Dry Dog Food Real Lamb & Sweet Potato Recipe, 4-lb bag

68

Scores 10 points higher with a similar formulation profile.

Worth a look
Different brand, different protein
supreme source

supreme source

51

Salmon instead of lamb, 7 points lower, different brand.

Surfaced from a vector similarity search across 3,491 scored dog foods. How this works.

Guaranteed analysis
Dry-matter protein: 29% ⓘ
Protein
26%
min (as fed)
Fat
11%
min (as fed)
Fiber
6.5%
max (as fed)
Moisture
10%
max
Ingredients

Read why each ingredient is good or bad for dogs.

53 total
Good Neutral Watch Flagged
  1. 1
    lamb meal

    Lamb cooked down to a dry concentrate. Per pound, more protein than fresh lamb. See why →

    Position 1: primary protein source. After cooking removes water, this may drop in proportional weight, but it anchors the recipe.

  2. 2
    peas

    Cheap protein bulk. Fine in small amounts, but when peas stack with lentils and chickpeas in the top ingredients, it's the pattern the FDA flagged in its heart-disease investigation. See why →

    Position 2. Pulse-family ingredient this high in the deck is a notable build choice. When stacked with other pulses in the top 10, matches the formulation pattern the FDA flagged in its diet-associated DCM investigation.

  3. 3
    chickpeas

    Also called garbanzo beans. Affordable plant protein source, part of the legume stack the FDA examined in its heart-disease investigation. See why →

    Position 3. Pulse-family ingredient this high in the deck is a notable build choice. When stacked with other pulses in the top 10, matches the formulation pattern the FDA flagged in its diet-associated DCM investigation.

  4. 4
    potato

    Standard white potato. Steady carb source, common starch in grain-free recipes.

    Position 4: meaningful whole-food inclusion. Source of vitamins, antioxidants, or natural fiber.

  5. 5
    chicken fat

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

    Position 5: secondary fat. Often where marine oils sit when present alongside a primary land-animal fat.

  6. 6
    fava beans

    Less common pulse. Same concern as peas when stacked with other legumes.

  7. 7
    canola meal
  8. 8
    flaxseeds

    Plural form, same as flaxseed. Plant source of omega-3, helpful for skin and coat.

  9. 9
    beef meal

    Beef cooked down to a dry concentrate. More protein per pound than fresh beef. See why →

    Position 9: supporting protein. Modest contribution to total protein weight.

  10. 10
    dried plain beet pulp

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

    Position 10: functional fiber for digestion or satiety.

  11. 11
    pea starch

    Refined starch from peas, mostly carbs after the protein is removed. Counts toward the legume stack the FDA examined.

    Position 11. Trace inclusion. Below the level associated with the FDA's DCM-pattern concerns.

  12. 12
    natural flavor

    Legal term for animal-derived flavoring, usually hydrolyzed liver or broth. Adds taste, says nothing about quality.

  13. 13
    salt

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

  14. 14
    pea protein

    Concentrated plant protein. Inflates the protein number on the label without matching the amino acid quality of meat.

    Position 14. Trace inclusion. Below the level associated with the FDA's DCM-pattern concerns.

  15. 15
    potassium chloride

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

  16. 16
    dried tomato pomace

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

  17. 17
    fish oil

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

  18. 18
    choline chloride

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

  19. 19
    l-threonine

    Essential amino acid. Sometimes added when plant proteins dominate, since threonine is naturally lower in plants than meat.

  20. 20
    dried seaweed meal
  21. 21
    taurine

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

  22. 22
    dl-methionine

    Essential amino acid. Often added when plant proteins dominate, since methionine is naturally lower in pulses than meat.

  23. 23
    blueberries

    Antioxidants, real. But the amount in any kibble is too small to do much. Mostly marketing.

  24. 24
    carrots

    Real vegetable. Fiber, beta-carotene, and a small amount of antioxidant value.

  25. 25
    cranberries

    Often added with a urinary-tract-support marketing angle. Real cranberry compounds help in concentrate form, but kibble doses are small.

Showing first 25 of 53. Position 1-5 has the largest weight in the recipe.

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