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Brand Comparison · 2026

Merrick vs Wellness CORE

Merrick (premium-tier kibble from a Nestlé Purina brand that meets 1 of WSAVA's 5 questions on its own published evidence) and Wellness CORE (higher-protein boutique kibble with partial WSAVA compliance) compared head-to-head on WSAVA manufacturer-quality criteria, AAFCO substantiation, monthly cost, and which dog each is best for in 2026. Wellness CORE meets 2 of 5 WSAVA criteria. Wellness CORE is roughly 14% less than Merrick.

The verdict

Wellness CORE meets 2 of 5 WSAVA questions at $55-95/month. Merrick meets 1 of 5 at $60-115/month. Wellness makes CORE in its own plants and publishes HACCP and BRC-certified quality controls. Merrick is made in Hereford plants that Nestlé Purina runs, and its quality evidence is a certificate reported in 2013, while its FAQ describes PhD nutritionists without naming any. Neither food has feeding-trial substantiation, since Wellness's label and Merrick's FAQ say formulated to AAFCO profiles.

The CORE case is higher protein and a current quality program. The Merrick case is premium-tier kibble from Purina-run plants. Merrick was named in 16 reports in the FDA's 2019 DCM update, while some individual complaints name grain-free CORE recipes, so ask your veterinarian before choosing either for a dog with cardiac risk factors.

Key differences at a glance

Quick comparison

DimensionMerrickWellness CORE
Parent companyNestlé PurinaWellness Pet Company
CategoryPremium dry kibbleBoutique dry kibble
WSAVA criteria met1 of 52 of 5
AAFCO substantiationFormulation onlyFormulation only
Full-time veterinary nutritionistPartialPartial
Credentialed formulatorPartialPartial
AAFCO feeding trialsNoNo
Owns manufacturing plantsYesYes
Quality control programPartialYes
Typical monthly cost (50 lb dog)$60 – $115 / month$55 – $95 / 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 ↗

Wellness Pet Company

Wellness CORE

Higher-protein boutique kibble with partial WSAVA compliance.

Strengths

  • Higher-protein formulations than mass-market alternatives
  • Owned manufacturing through Wellness Pet Company
  • Consistent ingredient sourcing

Watch-outs

  • Formulation-only AAFCO substantiation
  • No full-time board-certified veterinary nutritionist on staff
  • Not among the 16 brands the FDA's June 2019 update named most often; some individual complaints name grain-free CORE recipes

Best for: Owners who want higher protein content and accept partial WSAVA compliance.

Avoid if: Your dog is at risk of diet-associated DCM or you specifically want feeding-trial-substantiated food.

Visit Wellness CORE ↗

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. Wellness CORE is the better choice when: Owners who want higher protein content and accept partial WSAVA compliance.

On cost, Wellness CORE is roughly 14% less than Merrick at the midpoint of typical premium spec for a 50 lb adult dog. On WSAVA manufacturer-quality criteria, Wellness CORE meets 2 of 5 vs 1 of 5 for Merrick.

Checking one brand rather than the pair? See is Merrick WSAVA-approved or is Wellness CORE 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 Wellness CORE 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

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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.