Challenger Puppy & Adult Alpine Ranch Beef, Lamb & Pork Dry Dog Food, 24-lb bag
Nulo Challenger Puppy & Adult Alpine Ranch Beef, Lamb & Pork 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
Strong protein profile with beef as the primary ingredient, delivering high biological value.
Quality carbohydrate sources with fermentable fiber.
Quality fat sources: named fat with declared fat sources.
Controversial ingredients · 1
- sodium seleniteSynthetic 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 →
Tap any colored marker to learn why it's good or bad for dogs.
- 1protein animalbeef
Real meat. Dense in protein and iron. Some dogs are sensitive to it, but for most it's an excellent base.
- 2protein animallamb
Real meat. Often used for dogs with chicken or beef sensitivities. Slightly higher fat content than chicken.
- 3protein animalsalmon meal
Salmon cooked into a dry concentrate. Carries both protein and natural omega-3s in one ingredient.
- 4protein animalturkey meal
Turkey with the water cooked out. Per pound, packs more protein than fresh turkey.
- 5protein animalpork
Real meat. Dense protein and fat, though less common in dog food than chicken or beef.
- 6protein animalchicken meal
Chicken with the water cooked out. Per pound, packs more protein than fresh chicken.
- 7grainoats
Whole grain. Steady energy, soluble fiber, and well-tolerated by most dogs.
- 8grainbarley
Whole grain with a low glycemic profile and some soluble fiber. Easy on blood sugar.
- 9fatchicken fat
Despite the name, a high-quality energy source. Concentrated calories plus essential fatty acids like linoleic acid.
- 10grainmillet
Gluten-free whole grain. Fine for most dogs, often used as an alternative to rice.
- 11ground miscanthus grass
- 12othernatural flavor
Legal term for animal-derived flavoring, usually hydrolyzed liver or broth. Adds taste, says nothing about quality.
- 13mineralpotassium chloride
Required mineral. Sometimes used as a salt substitute. Standard inclusion in complete diets.
- 14mineralsalt
Sodium chloride. Required at small doses for normal physiology. Not a quality concern in standard amounts.
- 15vegetablepumpkin
Soluble fiber that supports stool quality. Mild and well-tolerated.
- 16fruitblueberries
Antioxidants, real. But the amount in any kibble is too small to do much. Mostly marketing.
- 17dried spinach
Leafy green. Some iron, vitamin K, and fiber. The dose in kibble is small but it's real food.
- 18fiberdried chicory root
Natural prebiotic. Feeds beneficial gut bacteria. The same compound (inulin) used in human gut-health products.
- 19supplementdl-methionine
Essential amino acid. Often added when plant proteins dominate, since methionine is naturally lower in pulses than meat.
- 20supplementcholine chloride
Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.
- 21supplementtaurine
Amino acid critical for heart health. Especially important in grain-free or pulse-heavy formulas where natural taurine precursors run thin.
- 22mineralcalcium carbonate
Source of calcium. Functional. Required in complete dog foods, especially those without bone-in meat meals.
- 23mineralzinc proteinate
Zinc bound to protein for better absorption. The premium form of the mineral, versus zinc oxide which sits cheaper on the label.
- 24vitaminvitamin e supplement
Required nutrient and a natural antioxidant. Often pulls double duty as a preservative.
- 25mineralzinc sulfate
Inorganic zinc. Effective at AAFCO doses but less well-absorbed than chelated forms like zinc proteinate.
Showing first 25 of 46. Position 1-5 has the largest weight in the recipe.
24 of 25 ingredients have a curated note. Coverage grows over time.
Nulo Challenger Puppy & Adult 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, except for growth of large size dogs (70 lb. or more as an adult).