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Nulo Challenger Alpine Ranch Beef, Lamb & Pork Large Breed Puppy Dry Dog Food, 24-lb bag
Nulo

Challenger Alpine Ranch Beef, Lamb & Pork Large Breed Puppy Dry Dog Food, 24-lb bag

Evidence Fair
dry all life stages $4.42/lb

Nulo Challenger Alpine Ranch Beef, Lamb & Pork Large Breed Puppy Dry Dog Food, 24-lb bag earns a Sniff Score of 84/100 (A) with Fair evidence. Zero controversial ingredients flagged. Strong protein profile with beef as the primary ingredient, delivering high biological value..

Graded by The Sniff System

Why this score

Strong protein profile with beef as the primary ingredient, delivering high biological value.

PQI

Quality carbohydrate sources with fermentable fiber.

CQI

Quality fat sources: named fat with declared fat sources.

FQI

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: 36%
Protein
32%
min (as fed)
Fat
14%
min (as fed)
Fiber
5%
max (as fed)
Moisture
10%
max
Ingredients

Tap any colored marker to learn why it's good or bad for dogs.

51 total
  1. 1
    beef

    Real meat. Dense in protein and iron. Some dogs are sensitive to it, but for most it's an excellent base.

  2. 2
    lamb

    Real meat. Often used for dogs with chicken or beef sensitivities. Slightly higher fat content than chicken.

  3. 3
    turkey meal

    Turkey with the water cooked out. Per pound, packs more protein than fresh turkey.

  4. 4
    chicken meal

    Chicken with the water cooked out. Per pound, packs more protein than fresh chicken.

  5. 5
    salmon meal

    Salmon cooked into a dry concentrate. Carries both protein and natural omega-3s in one ingredient.

  6. 6
    oats

    Whole grain. Steady energy, soluble fiber, and well-tolerated by most dogs.

  7. 7
    millet

    Gluten-free whole grain. Fine for most dogs, often used as an alternative to rice.

  8. 8
    barley

    Whole grain with a low glycemic profile and some soluble fiber. Easy on blood sugar.

  9. 9
    pork

    Real meat. Dense protein and fat, though less common in dog food than chicken or beef.

  10. 10
    chicken fat

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

  11. 11
    ground miscanthus grass
  12. 12
    rye
  13. 13
    natural flavor

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

  14. 14
    chicken cartilage
  15. 15
    ground flaxseed

    Cracked flaxseed for better digestibility. Same plant omega-3s as whole flaxseed, just easier for the dog to extract.

  16. 16
    potassium chloride

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

  17. 17
    carrots

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

  18. 18
    salt

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

  19. 19
    pumpkin

    Soluble fiber that supports stool quality. Mild and well-tolerated.

  20. 20
    blueberries

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

  21. 21
    dried spinach

    Leafy green. Some iron, vitamin K, and fiber. The dose in kibble is small but it's real food.

  22. 22
    dried chicory root

    Natural prebiotic. Feeds beneficial gut bacteria. The same compound (inulin) used in human gut-health products.

  23. 23
    dl-methionine

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

  24. 24
    choline chloride

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

  25. 25
    calcium carbonate

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

Showing first 25 of 51. Position 1-5 has the largest weight in the recipe.

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

AAFCO statement

NUTRITION STATEMENT Nulo Challenger Large Breed Puppy Alpine Ranch Beef, Lamb, & Pork Recipe Dog Food is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for all life stages, including growth of large size dogs (70 lb. or more as an adult).