Home / Dog food / Merrick / Grain Free Real Duck & Sweet Potato Dry Dog Food
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Grain Free Real Duck & Sweet Potato Dry Dog Food
A formulated-to-meet, deboned-first dry food that's cheaper per calorie than 40% of the dry foods we've priced and denser than 51% (you feed fewer cups) — $2.06 a day for your 40-lb adult dog.
THE FACTS, ONE SENTENCE — data as JSON · reference dog 40 lb · updated 2026-07-12
The evidence
The Verified Label
Every food on this site gets this exact panel — same fields, same order, sourced from the official label — so brands finally become comparable. Dots show where this food sits among all 494 dry foods we've verified.
verified 2026-07-12
Composition — dry-matter basis
why dry matter
Calories & cost — for your 40-lb adult dog
Cost per 1,000 kcal: $2.10 — cheaper than 40% of the 360 dry foods we've priced (median $1.93). Serving math uses standard veterinary energy formulas — see the formula.
Standards & ingredients
what this means
why unknown
Safety
Source: official label source (official)· price: Amazon, 2026-07-12 · anchors: 494 verified dry dog foods (360 priced) · how to read this label
The fit
For your dog, specifically
Checked for a 40-lb adult with a sensitive stomach — the same published criteria our finder uses. Change your dog above and these update.
The source material
The full ingredient list
Every flag on the Verified Label is computed from this list. Ingredients are ordered by pre-cooking weight — the first five carry the most information.
Deboned Duck, Chicken Meal, Turkey Meal, Sweet Potatoes, Potatoes, Peas, Chicken Fat, Fish Meal, Potato Protein, Chicken, Pea Protein, Flaxseed, Natural Flavor, Dried Yeast, Miscanthus Grass, Sunflower Oil, Potassium Chloride, Salt, Alfalfa Meal, Choline Chloride, Apples, Blueberries, MINERALS [Iron Amino Acid Complex, Zinc Amino Acid Complex, Zinc Sulfate, Sodium Selenite, Manganese Amino Acid Complex, Copper Amino Acid Complex, Copper Sulfate, Potassium Iodide, Cobalt Proteinate, Cobalt Carbonate], Taurine, Mixed Tocopherols For Freshness, Salmon Oil, Yucca Schidigera Extract, VITAMINS [Vitamin E Supplement, Vitamin B-12 Supplement, Calcium Pantothenate (Vitamin B-5), Vitamin A Supplement, Thiamine Mononitrate (Vitamin B-1), Folic Acid (Vitamin B-9), Riboflavin Supplement (Vitamin B-2), Niacin (Vitamin B-3), Menadione Sodium Bisulfite Complex (Vitamin K), Pyridoxine Hydrochloride (Vitamin B-6), Biotin (Vitamin B-7), Vitamin D-3 Supplement], Rosemary Extract, Dried Enterococcus Faecium Fermentation Product, Dried Lactobacillus Acidophilus Fermentation Product, Dried Lactobacillus Casei Fermentation Product, Dried Lactobacillus Plantarum Fermentation Product
Wet ingredients like fresh deboned duck shrink once cooked — which is why named meals appearing high on the list matter: they keep meaningful animal protein after moisture is removed.
Nutritional twins
Cheaper close matches
Verified foods with a closely matching label at a meaningfully lower cost per 1,000 kcal.
Label-composition matches only: same species, form, and growth stage; same primary protein where both are known; grain-free preserved; protein within 4 points and fat within 4 points, and estimated carbs within 8 points, on a dry-matter basis. Not a medical or quality recommendation.
The maker
Who makes this — and how they back it up
The four questions the WSAVA nutrition guidelines tell you to ask a pet-food company. Every answer is sourced or marked as an undisclosed gap — never guessed. This is the "is it made competently?" axis that star-rating sites skip.
Merrick owns and operates its own dry plant and wet cannery in Hereford, Texas.
source →Merrick's parent Nestlé Purina PetCare employs a board-certified veterinary nutritionist (Arleigh Reynolds, DVM), but Merrick operates as an independent business and no fetched source names a board-certified veterinary nutritionist or PhD animal nutritionist on Merrick's own staff, so value is null.
source →No feeding-trial AAFCO statement found on the 123 labels we’ve verified for this brand, and no company-wide claim was found either. Most pet foods are only "formulated to meet" AAFCO profiles (a paper calculation) rather than fed to real animals in trials — this is common, not necessarily a red flag.
Count of PubMed-indexed records with the entity in an author affiliation (animal/pet-domain filtered). A reproducible FLOOR, not a total: affiliation strings vary and some research is published under institute names. research_entity_affiliation is recorded only for manufacturers with a dedicated pet-nutrition research arm; brand_affiliation.count is null where the brand name is an ambiguous homonym.
Full company scorecard, sources, and every SKU we've verified for this brand: Merrick brand page →