How We Ranked These
Every food on this list was scored using KibbleIQ’s ingredient analysis rubric, which evaluates protein quality, filler content, preservative safety, and overall ingredient transparency on a 0–100 scale. For Newfoundlands specifically we weighted three additional factors: large-breed-balanced calcium-phosphorus mineral profile (calcium 1.0–1.8% dry matter, calcium-to-phosphorus 1.1–1.4 ratio per AAFCO large-breed-growth guidance), grain-inclusive cardiac-safe formulation (Newfoundlands are on the FDA-CVM 2018–2024 diet-associated DCM watchlist), and taurine + L-carnitine inclusion for cardiac muscle support.
The 2018–2024 FDA-CVM diet-associated dilated cardiomyopathy investigation identified Newfoundlands among the over-represented breeds in case reports. The Pyle 1976 subaortic stenosis epidemiology and follow-up echocardiographic surveys established Newfoundland as the highest-prevalence breed for inherited SAS at ~10% radiographic prevalence. The AVMA and ACVIM cardiology consensus recommend grain-inclusive food as default for any breed with documented cardiac risk plus taurine supplementation (~1,000 mg/day for an adult Newfoundland) under veterinary guidance. We downgrade legume-heavy grain-free formulations across the board.
Our Top 5 Picks
1. Blue Buffalo Life Protection Large Breed — B (80/100)
Blue Buffalo Life Protection Large Breed leads with deboned chicken + chicken meal lead with large-breed-balanced calcium-phosphorus ratio and built-in glucosamine + chondroitin + LifeSource Bits supplemental antioxidants. For a Newfoundland, that structural foundation matches the breed’s specific nutritional needs at a defensible ingredient-quality tier. Blue Buffalo Life Protection Large Breed is explicitly formulated to large-breed AAFCO mineral guidance with calcium-phosphorus balanced for slow controlled-growth orthopedic development and built-in glucosamine + chondroitin for the hip and elbow dysplasia risk profile. The grain-inclusive backbone (whole-grain brown rice + oatmeal + barley) is cardiac-safe-positioned per FDA-CVM precautionary guidance, and the deboned chicken + chicken meal lead delivers moderate-protein formulation appropriate for a giant breed. Read our full Blue Buffalo Life Protection Large Breed review → · Shop on Amazon →
2. Purina Pro Plan — C (58/100)
Purina Pro Plan leads with vet-channel formulation with extensive feeding-trial substantiation and tight quality-control at owned-and-operated plants. For a Newfoundland, that structural foundation matches the breed’s specific nutritional needs at a defensible ingredient-quality tier. Purina Pro Plan Large Breed Adult is the standard veterinarian-recommended food for giant breeds with documented cardiac risk — the brand was among the first to publicly add supplemental taurine to dry-formula recipes in response to the FDA-CVM DCM signal. The vet-channel formulation, feeding-trial substantiation, and tight quality-control at owned-and-operated plants are particularly load-bearing for a breed with the cardiac and inherited-disease risk profile a Newfoundland carries. Read our full Purina Pro Plan review → · Shop on Amazon →
3. Open Farm — A (90/100)
Open Farm leads with humane-certified animal ingredients with full traceability (every bag traceable to source farms) and Ocean Wise + Certified Humane partnerships. For a Newfoundland, that structural foundation matches the breed’s specific nutritional needs at a defensible ingredient-quality tier. Open Farm Wild-Caught Salmon delivers marine omega-3 EPA + DHA from a single-source protein with full bag-level traceability and grain-inclusive (oats + chickpeas) cardiac-safe positioning. For Newfoundland owners specifically valuing humane-certified animal sourcing on a giant breed they’ll feed roughly 5–7 cups of food per day to for 8–10 years, the per-bag premium is structurally defensible at a meaningful magnitude. Read our full Open Farm review → · Shop on Amazon →
4. Hill's Science Diet — B (75/100)
Hill's Science Diet leads with vet-recommended balanced formula with extensive feeding-trial substantiation and clinical-research backing. For a Newfoundland, that structural foundation matches the breed’s specific nutritional needs at a defensible ingredient-quality tier. Hill’s Science Diet Large Breed Adult delivers vet-channel formulation with feeding-trial substantiation and clinical-research backing. The brand has the longest body of published cardiac-nutrition research in the kibble category and added supplemental taurine to multiple large-breed formulations in response to the FDA-CVM DCM signal. Particularly load-bearing for Newfoundland owners whose vet is steering them toward conservative kibble-tier choices with extensive clinical-research backing. Read our full Hill's Science Diet review → · Shop on Amazon →
5. Fromm — A (90/100)
Fromm leads with duck + chicken meal + menhaden fish meal with probiotics, salmon oil, and moderate grain (oatmeal + barley). For a Newfoundland, that structural foundation matches the breed’s specific nutritional needs at a defensible ingredient-quality tier. Fromm Adult Gold Large Breed delivers grain-inclusive moderate-protein formulation with one of the cleanest recall histories in the industry. The family-mill production model and consistent recipe formulation across batches give Newfoundland owners managing a giant breed with multiple inherited-disease vectors (cardiac, orthopedic, cystinuric) meaningful quality-control assurance. Read our full Fromm review → · Shop on Amazon →
What to Look for in Food for Newfoundlands
Large-breed-balanced calcium-phosphorus mineral profile. Newfoundland puppies are in the highest-risk category for calcium-driven orthopedic developmental disease (osteochondritis dissecans, hip dysplasia, hypertrophic osteodystrophy). AAFCO large-breed-growth nutrient profile sets calcium at 1.0–1.8% dry matter, calcium-to-phosphorus 1.1–1.4 ratio. For puppies through ~18 months, look for foods explicitly labeled for large-breed growth or all-life-stages with large-breed compliance. Avoid puppy formulations that lack large-breed labeling — standard puppy food often carries calcium at 1.6–2.0% DM which is at the upper edge of the safe range for a Newfoundland growing to 100+ lb.
Grain-inclusive cardiac-safe formulation. Newfoundlands are on the FDA-CVM 2018–2024 diet-associated DCM watchlist and carry elevated subaortic stenosis prevalence per Pyle 1976. The precautionary AVMA and ACVIM cardiology consensus is grain-inclusive food as default. Whole-grain brown rice, oatmeal, and barley are credible carb-base ingredients; legume-heavy grain-free formulations (peas, lentils, chickpeas as primary carb source) should be avoided unless your veterinary cardiologist has specifically prescribed one. Ask your vet about supplemental taurine (~1,000 mg/day for an adult Newfoundland) as additional cardiac insurance.
Joint-protective glucosamine + chondroitin. Newfoundlands carry one of the highest OFA-documented hip dysplasia rates of any breed (~25% dysplastic findings on voluntary radiographic submissions) plus elevated elbow dysplasia and cruciate ligament rupture risk. Look for foods with explicit glucosamine hydrochloride and chondroitin sulfate inclusion at large-breed-relevant doses, and supplement with separate joint care (Cosequin DS, Dasuquin) starting at 4–5 years. Maintain a body condition score of 4–5 of 9 — every additional kilogram of body weight on a Newfoundland measurably accelerates joint wear.
Cystinuria awareness if your dog tests positive. Roughly 1:140 male Newfoundlands carry heritable cystinuria with associated cystine bladder-stone risk per Brons 2013 (genetic testing is available; OFA registry tracks the breed). Cystinuric dogs benefit from reduced-cystine protein sources (egg, dairy, soy are lower-cystine; high-meat-content formulas can be higher-cystine), increased water intake, and urine-alkalinizing nutrition. Prescription urinary formulations (Hill’s u/d, Royal Canin Urinary UC) are the standard of care for symptomatic dogs — work with your vet rather than choosing over-the-counter formulas if cystinuria is confirmed.
Bottom Line
The best Newfoundland food solves four problems at once: large-breed-balanced calcium-phosphorus minerals for orthopedic development, grain-inclusive cardiac-safe formulation per FDA-CVM precautionary guidance, joint-protective glucosamine + chondroitin for the breed’s ~25% hip dysplasia rate, and taurine + L-carnitine for cardiac muscle support on the subaortic-stenosis-plus-DCM-watchlist risk profile. Blue Buffalo Life Protection Large Breed is our top pick — AAFCO large-breed compliant, grain-inclusive, joint-supportive. Purina Pro Plan Large Breed and Open Farm Wild-Caught Salmon are the vet-channel and premium-sourcing alternatives. Skip grain-free unless your veterinary cardiologist has prescribed one specifically.
Related condition deep-dive: Best Dog Food for Large Breeds