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Brand Comparison · 2026

Merrick vs Nutro

Merrick (premium-tier kibble from a Nestlé Purina brand that meets 1 of WSAVA's 5 questions on its own published evidence) and Nutro (premium-tier kibble from Mars Petcare, a maker that meets 4 of WSAVA's 5 questions) compared head-to-head on WSAVA manufacturer-quality criteria, AAFCO substantiation, monthly cost, and which dog each is best for in 2026. Nutro meets 4 of 5 WSAVA criteria. Nutro is roughly 29% less than Merrick.

The verdict

Both are premium kibbles from big parents, Nestlé Purina for Merrick and Mars Petcare for Nutro, and they score three points apart. Nutro meets 4 of 5 WSAVA questions at $55-70/month. Merrick meets 1 of 5 at $60-115/month. Nutro's credit comes from Mars Petcare's named PhD nutrition scientists, the owned dry-food factories its FAQ lists in Henderson, NC and Victorville, CA, and published testing, HACCP and on-site quality experts. Merrick's FAQ names no nutritionist, and the only quality evidence found is a 2013 trade-press report of its Hereford plant's SQF certificate.

Nutro's FAQ says its recipes are formulated to meet AAFCO profiles, and Merrick's says the same without a feeding-test claim, so neither has feeding trials to point to. Nutro costs less and documents more. Merrick only wins if your dog does best on one of its recipes. Ask your veterinarian before changing a dog's diet for health reasons.

Key differences at a glance

Quick comparison

DimensionMerrickNutro
Parent companyNestlé PurinaMars Petcare
CategoryPremium dry kibblePremium dry kibble
WSAVA criteria met1 of 54 of 5
AAFCO substantiationFormulation onlyFormulation only
Full-time veterinary nutritionistPartialYes
Credentialed formulatorPartialYes
AAFCO feeding trialsNoNo
Owns manufacturing plantsYesYes
Quality control programPartialYes
Typical monthly cost (50 lb dog)$60 – $115 / month$55 – $70 / month

Nestlé Purina

Merrick

Premium-tier kibble from a Nestlé Purina brand that meets 1 of WSAVA's 5 questions on its own published evidence.

Strengths

  • Made in the Hereford, Texas plants that Nestlé Purina runs
  • Merrick's FAQ says trained animal nutritionists, including PhDs, formulate the food
  • The Hereford plant earned SQF Level 3 certification in 2013

Watch-outs

  • No nutritionist is named and no board certification is stated
  • The FAQ says formulated to AAFCO profiles, with no feeding-test claim
  • Quality-control evidence is a 2013 certificate. Merrick's current pages describe no testing program
  • Named in 16 reports in the FDA's 2019 DCM update. The FDA did not establish that any food caused the disease

Best for: Owners shopping the premium kibble tier who accept thinner public evidence on nutrition staff and testing.

Avoid if: You want a named nutritionist, feeding-trial substantiation or a published testing program.

Visit Merrick ↗

Mars Petcare

Nutro

Premium-tier kibble from Mars Petcare, a maker that meets 4 of WSAVA's 5 questions.

Strengths

  • Meets 4 of WSAVA's 5 questions through Mars Petcare's named PhD nutrition scientists
  • Its FAQ lists owned dry-food factories in Henderson NC and Victorville CA, though a February 2025 report says Henderson is making Iams again
  • Publishes testing, HACCP and on-site quality experts for all Nutro facilities

Watch-outs

  • The FAQ says all recipes are "formulated to meet" AAFCO profiles, with no feeding-test claim
  • No Nutro page says who formulates the recipes, so the credit comes from Mars Petcare's staff
  • Costs more than Pedigree or Iams
  • Named in 10 reports in the FDA's 2019 DCM update. The FDA did not establish that any food caused the disease

Best for: Healthy adult dogs whose owners want premium-tier kibble from a maker that meets 4 of WSAVA's 5 questions.

Avoid if: You want feeding-trial substantiation on the label or are on a tight budget.

Visit Nutro ↗

Which is better for your dog?

The right pick depends on your individual dog. Merrick is the better choice when: Owners shopping the premium kibble tier who accept thinner public evidence on nutrition staff and testing. Nutro is the better choice when: Healthy adult dogs whose owners want premium-tier kibble from a maker that meets 4 of WSAVA's 5 questions.

On cost, Nutro is roughly 29% less than Merrick at the midpoint of typical premium spec for a 50 lb adult dog. On WSAVA manufacturer-quality criteria, Nutro meets 4 of 5 vs 1 of 5 for Merrick.

Checking one brand rather than the pair? See is Merrick WSAVA-approved or is Nutro WSAVA-approved.

Where to buy

Made your pick?

Check current pricing on whichever brand fits your dog. Prices and promotions change frequently, so it is worth comparing both before you commit to a bag or a subscription.

Shop Merrick on Chewy →Shop Nutro on Chewy →

Disclosure: these are affiliate links and IntelliBowl may earn a commission at no extra cost to you. Commission does not influence the comparison above. See our methodology.

Personalized recommendation

Skip the brand decision and get a food matched to your specific dog.

IntelliBowl's free 60-second quiz ranks 14+ brands (including Merrick and Nutro) against your dog's age, breed, weight, activity, allergies, and budget. Completely free.

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Compare these brands against others

Methodology: WSAVA criteria reflect each brand's publicly documented manufacturer-quality practices as of October 2026, scored against the WSAVA Global Nutrition Committee's 5-question rubric. AAFCO substantiation reflects the dominant method used across the brand's main retail product line. Monthly cost reflects typical US 2026 retail for a 50 lb adult dog at premium spec, before autoship discounts. Recommendations are editorial and not influenced by affiliate relationships. See our recommendation methodology for IntelliBowl's quiz-engine ranking logic.