Brand Comparison · 2026

Blue Buffalo vs Hill's Science Diet

Blue Buffalo (mid-premium kibble marketed on ingredient quality; partial WSAVA compliance) and Hill's Science Diet (veterinarian-recommended premium kibble with the deepest prescription-diet portfolio on the market) compared head-to-head on WSAVA manufacturer-quality criteria, AAFCO substantiation, monthly cost, and which dog each is best for in 2026. Hill's Science Diet meets 5 of 5 WSAVA criteria. Blue Buffalo and Hill's Science Diet cost about the same.

The verdict

This is a compliance gap, not a marketing tie. Hill's Science Diet meets all 5 WSAVA criteria with AAFCO feeding-trial substantiation from an owned research facility; Blue Buffalo meets 2 of 5 and relies on formulation-only substantiation without owning all of its manufacturing. What Blue Buffalo offers instead is strong consumer-facing ingredient transparency and broad retail recognition, backed by General Mills' scale since 2018.

Choose Hill's, priced $55-85/month, if you want a clinical track record, feeding-trial proof, and a clean path to prescription diets. Choose Blue Buffalo, at $50-90, only if you specifically prioritize ingredient-list transparency over WSAVA manufacturer-quality criteria. If meeting all 5 WSAVA criteria is your bar, Hill's is the obvious pick.

Key differences at a glance

Different makers: Blue Buffalo is General Mills; Hill's Science Diet is Colgate-Palmolive.
WSAVA manufacturer-quality: Hill's Science Diet meets 5 of 5 criteria vs 2 of 5 for Blue Buffalo.
AAFCO substantiation differs: Blue Buffalo uses formulation only; Hill's Science Diet uses AAFCO feeding trials.
Heart-health context: Blue Buffalo appears in the FDA's diet-related DCM investigation, which has not established that any food caused the disease.

Quick comparison

Dimension	Blue Buffalo	Hill's Science Diet
Parent company	General Mills	Colgate-Palmolive
Category	Boutique dry kibble	Premium dry kibble
WSAVA criteria met	2 of 5	5 of 5
AAFCO substantiation	Formulation only	Feeding trials
Full-time veterinary nutritionist	Yes	Yes
Credentialed formulator	Partial	Yes
AAFCO feeding trials	No	Yes
Owns manufacturing plants	Partial	Yes
Quality control program	Yes	Yes
Typical monthly cost (50 lb dog)	$50 – $90 / month	$55 – $85 / month

General Mills

Blue Buffalo

Mid-premium kibble marketed on ingredient quality; partial WSAVA compliance.

Strengths

Strong consumer-facing ingredient transparency
Wide retail availability and brand recognition
Acquired by General Mills (2018) added scale and QC discipline

Watch-outs

Formulation-only substantiation (no feeding trials)
Does not own all manufacturing: reports owning about 80% of its plants and still uses a co-manufacturer
Caught up in past lawsuits over advertising claims
Named in 31 reports in the FDA's 2019 DCM update. The FDA did not establish that any food caused the disease

Best for: Owners who prioritize ingredient-list transparency over WSAVA manufacturer-quality criteria.

Avoid if: You specifically want a brand that meets all 5 WSAVA criteria.

Visit Blue Buffalo ↗

Colgate-Palmolive

Hill's Science Diet

Veterinarian-recommended premium kibble with the deepest prescription-diet portfolio on the market.

Strengths

Most extensively used brand in US veterinary clinical practice
50+ years of feeding trial data from an owned research facility
Strong palatability across life stages
Pairs cleanly with Hill's Prescription Diet for any future therapeutic needs

Watch-outs

Higher price than Purina Pro Plan at comparable nutritional spec
Less breed-specific formulation than Royal Canin
Vitamin D toxicity recall in 2019 affected canned formulas

Best for: Healthy adult dogs where you want continuity from over-the-counter to prescription within a single brand.

Avoid if: You are highly price-sensitive and your dog has no medical conditions.

Visit Hill's Science Diet ↗

Which is better for your dog?

The right pick depends on your individual dog. Blue Buffalo is the better choice when: Owners who prioritize ingredient-list transparency over WSAVA manufacturer-quality criteria. Hill's Science Diet is the better choice when: Healthy adult dogs where you want continuity from over-the-counter to prescription within a single brand.

On cost, Blue Buffalo and Hill's Science Diet cost about the same at the midpoint of typical premium spec for a 50 lb adult dog. On WSAVA manufacturer-quality criteria, Hill's Science Diet meets 5 of 5 vs 2 of 5 for Blue Buffalo.

Checking one brand rather than the pair? See is Blue Buffalo WSAVA-approved or is Hill's Science Diet 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 Blue Buffalo on Chewy →Shop Hill's Science Diet 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.