Top 5 large-breed puppy picks at a glance
| # | Brand | Score | Calcium control | Why it earns the pick |
|---|---|---|---|---|
| 1 | Orijen Puppy Large | A/90 | AAFCO Large Size Growth | 85% animal ingredients with explicit large-size growth substantiation |
| 2 | Acana Puppy Large | A/90 | AAFCO Large Size Growth | Same Champion Petfoods sourcing as Orijen at lower price point |
| 3 | Nulo Puppy | A/90 | All life stages incl. large-size growth | BC30 probiotic + L-carnitine + appropriate calcium for ≥70 lb adults |
| 4 | Wellness Puppy Large Breed | B/78 | AAFCO Large Size Growth | Glucosamine + chondroitin + value pricing with verified large-size substantiation |
| 5 | Hill’s SD Large Breed Puppy | C/58 | Feeding-trial Large Size Growth | Validated calcium control via published feeding trials; lower ingredient grade |
How We Ranked These
Every food on this list was scored using KibbleIQ’s Dry Kibble Rubric, which evaluates protein quality, filler content, preservative safety, and ingredient transparency on a 0–100 scale. The same ingredient list always produces the same grade-and-score (A/90, B/78, C/58), so picks are reproducible across the site. For large-breed puppy growth, the rubric grade and the clinical fit are partially decoupled — therapeutic Large Size Growth diets like Hill’s Science Diet Large Breed Puppy earn lower rubric grades because they rely on cereal grains and calcium-precise mineral premixes in a higher-filler base, but they deliver the documented calcium control that the AAFCO 2020 update identified as the dominant skeletal-safety lever for puppies expected to exceed 70 lb adult weight.
We weighted the AAFCO 2020 Dog Food Nutrient Profiles update establishing the 1.8 g calcium per 1000 kcal cap for Large Size Growth substantiation, Hazewinkel et al. 1985 (the seminal study establishing dietary calcium excess as a cause of canine osteochondrosis), Schoenmakers et al. 2000 (Ca:P ratio effects in growing Great Danes), Nap et al. 1991 (overnutrition and skeletal disease in Great Dane puppies), Lauten 2006 (slow-growth nutrition for large-breed puppies), the WSAVA Global Nutrition Guidelines, the AAHA 2022 Pediatric Care Guidelines, and the Kealy et al. 1992 lifetime restricted-feeding RCT in Labradors. Per the WSAVA consensus, the four pillars of large-breed puppy nutrition are (1) AAFCO Large Size Growth substantiation, (2) controlled calcium at the 1.8 g per 1000 kcal cap, (3) controlled calorie intake to maintain BCS 4–5 of 9 through skeletal maturity, and (4) adequate high-quality protein for lean muscle development without overnutrition.
Our Top 5 Picks
1. Orijen Puppy Large — A (90/100)
Orijen Puppy Large is explicitly substantiated to AAFCO Dog Food Nutrient Profiles for Growth, including the growth of large size dogs (70 lb or more as adults). The 85% animal-ingredient density per Champion Petfoods’ published BAFRINO formulation delivers the high-quality protein that growing large-breed puppies need without overnutrition — per Lauten 2006, slow-growth nutrition produces sounder adult skeletal structure than fast-growth feeding. Calcium is held at the AAFCO Large Size Growth cap with documented mineral analyses on every batch.
For owners who can support the price point, Orijen Puppy Large is the highest-leverage pick when ingredient quality and skeletal safety are the joint priorities. The fresh and raw chicken, turkey, herring, and flounder inclusions provide complete amino acid profiles for lean muscle development without the high-grain bases that often mark the lower-priced Large Size Growth diets. Read our full Orijen Puppy review → · Shop on Amazon →
2. Acana Puppy Large — A (90/100)
Acana Puppy Large delivers most of Orijen’s nutritional philosophy at 60–70% animal ingredient density (vs Orijen’s 85%) and a meaningfully lower price point. For owners feeding a Great Dane, Mastiff, Saint Bernard, or other giant-breed puppy over the 18–24 month skeletal-maturity window, that price differential matters — both brands are made by Champion Petfoods in the same Kentucky facilities, so quality control, sourcing standards, and Large Size Growth substantiation are equivalent. The AAFCO Large Size Growth statement is on the bag.
Per Schoenmakers et al. 2000, the Ca:P ratio in growing Great Danes matters as much as absolute calcium content, and Acana’s formulation holds the ratio in the AAFCO-recommended 1:1 to 1.8:1 window. Per the WSAVA Global Nutrition Guidelines, formula consistency through the entire growth phase — not switching brands at 6 months — produces the most predictable skeletal outcomes. Read our full Acana Puppy review → · Shop on Amazon →
3. Nulo Puppy — A (90/100)
Nulo Puppy is substantiated for all life stages including the growth of large size dogs, which gives owners flexibility — one bag covers a Great Dane puppy from 8 weeks through adult maintenance without a mid-growth formula switch. The included BC30 (Bacillus coagulans) probiotic at 90 million CFU per pound is one of the highest documented probiotic inclusions in the OTC puppy category, supporting microbiome stability through the immune-development window per Suchodolski 2021. L-carnitine inclusion supports the lean-muscle-vs-fat metabolism that the WSAVA flags as the dominant Large Size Growth feeding lever.
For owners who want a single formula across the family with multiple puppies of different breed sizes, Nulo’s all-life-stages-with-large-size-growth substantiation simplifies the household feeding plan without sacrificing the calcium-control specification. Salmon and turkey deliver named-animal protein at the top of the ingredient deck. Read our full Nulo Puppy review → · Shop on Amazon →
4. Wellness Puppy Large Breed — B (78/100)
Wellness Puppy Large Breed is the strongest value pick on this list with confirmed AAFCO Large Size Growth substantiation. Deboned chicken, chicken meal, and oatmeal lead the ingredient deck, calcium is held at the AAFCO Large Size Growth cap, and supplemental glucosamine and chondroitin add joint-support nutraceuticals through the skeletal-development window. For owners feeding a 70–110 lb adult-weight breed (Labrador, Golden Retriever, German Shepherd, Boxer) where Orijen and Acana’s price point compounds over an 18-month growth phase, Wellness Puppy Large Breed delivers the spec at meaningfully lower lifetime cost.
The grain-inclusive base (oatmeal, brown rice) avoids the legume-heavy formulations the FDA 2018 DCM investigation flagged for breeds with cardiac risk — relevant for Boxer puppies whose breed has documented arrhythmogenic right ventricular cardiomyopathy (ARVC) susceptibility per Meurs et al. 2010. Read our full Wellness Puppy review → · Shop on Amazon →
5. Hill’s Science Diet Large Breed Puppy — C (58/100)
Hill’s Science Diet Large Breed Puppy is the only food on this list substantiated for Large Size Growth via published AAFCO feeding trials (vs formulation-to-meet substantiation). Per the AAFCO Dog Food Nutrient Profiles, feeding-trial substantiation is the higher-evidence tier — documented body-weight, hematology, and serum-chemistry outcomes in real puppies fed the food for the trial period, not just calculated nutrient analysis. For owners whose veterinarian has specifically directed feeding-trial-substantiated nutrition (more common for atypical-breed or veterinary-monitored growth), Hill’s SD Large Breed Puppy is the documented choice.
The C/58 ingredient grade reflects rubric scoring on the chicken-meal-and-cracked-pearled-barley base with corn gluten meal in the top 5 ingredients — the rubric isn’t designed to elevate feeding-trial substantiation above ingredient quality. For Large Size Growth specifically, the calcium control and feeding-trial documentation is the value proposition. Discuss with your veterinarian whether feeding-trial substantiation is a relevant priority for your puppy’s breed and monitoring plan. Read our full Hill’s SD Puppy review → · Shop on Amazon →
What to Look for in Large-Breed Puppy Food
AAFCO Large Size Growth substantiation is the non-negotiable spec. Per the AAFCO Dog Food Nutrient Profiles 2020 update, foods substantiated for the growth of large size dogs (puppies expected to exceed 70 lb adult body weight) are capped at 1.8 g calcium per 1000 kcal — meaningfully lower than the generic puppy growth maximum. The AAFCO statement on the bag should read “formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for Growth, including the growth of large size dogs (70 lb or more as adults)” or feeding-trial language for the same life stage. A generic “for growth” statement without the large-size language is insufficient for a Great Dane, Saint Bernard, Mastiff, Newfoundland, Bernese Mountain Dog, or any breed expected to exceed 70 lb at maturity.
Excess calcium causes orthopedic disease in large-breed puppies. Per Hazewinkel et al. 1985 (the foundational JAVMA study), large-breed puppies fed dietary calcium above the AAFCO Large Size Growth cap developed osteochondrosis, hypertrophic osteodystrophy, and skeletal disturbances at meaningfully higher rates than calcium-controlled controls. Per Schoenmakers et al. 2000, the mechanism is that large-breed puppies cannot down-regulate intestinal calcium absorption the way small-breed puppies can — dietary calcium excess passes directly to growing skeletal tissue and disrupts the carefully-controlled cartilage-to-bone conversion that defines healthy joint development. The 1.8 g per 1000 kcal cap is the documented safety threshold.
Slow growth produces sounder adults than fast growth. Per Lauten 2006 and Nap et al. 1991, large-breed puppies fed to maintain a slightly lean body condition (BCS 4 of 9) through skeletal maturity develop sounder adult skeletons than puppies fed to maintain ideal BCS 5 of 9. Per Kealy et al. 1992 (the lifetime restricted-feeding RCT in Labrador Retrievers), Labradors fed 25% less than free-fed littermates from 8 weeks through life had meaningfully lower hip dysplasia incidence, delayed osteoarthritis onset, and longer median lifespan. The practical translation: feed to the lower end of the bag’s recommended range for your puppy’s body weight, and recheck BCS at every veterinary visit through the 18–24 month skeletal-maturity window.
Adequate high-quality protein supports lean muscle without overnutrition. The 1990s-era guidance that large-breed puppies should be fed lower protein has been superseded — per the WSAVA Global Nutrition Guidelines and the AAFCO 2020 update, the issue was never protein per se but caloric overnutrition and calcium excess. Adequate high-quality protein at the AAFCO growth profile minimum (22% DM, with adjusted minimum of 25% DM for puppies under 14 weeks per the AAFCO 2020 update) supports lean muscle development. The mistake is feeding lower-quality protein to compensate for cost — lower biological-value protein increases total feed volume to meet amino-acid needs, which compounds the calorie-and-calcium overnutrition risk.
Skeletal maturity timing differs by breed size. Per the AAHA 2022 Pediatric Care Guidelines, skeletal maturity (growth-plate closure) timing is breed-size-dependent: small breeds (under 20 lb adult weight) close growth plates around 8–10 months; medium breeds (20–50 lb) close around 12–14 months; large breeds (50–90 lb) close around 14–18 months; giant breeds (over 90 lb) can take 18–24 months. The Large Size Growth feeding window therefore extends meaningfully longer for giant-breed puppies than for medium-breed puppies. Plan to keep a Great Dane, Saint Bernard, Mastiff, or Newfoundland puppy on Large Size Growth substantiated nutrition through 18–24 months — the calcium-control benefit ends when growth plates close, not at a fixed calendar age.
Avoid grain-free legume-heavy formulas in cardiac-risk breeds. Per the FDA 2018 DCM grain-free investigation and Adin et al. 2019 (the Tufts cardiology review), grain-free formulas with peas, lentils, or potatoes in the top 5 ingredients have been associated with diet-related dilated cardiomyopathy (DCM) in dogs. For large-breed puppies of breeds with documented cardiac risk — Doberman Pinscher (DCM), Boxer (ARVC per Meurs 2010), Great Dane (DCM), Irish Wolfhound, Newfoundland — grain-inclusive Large Size Growth formulas without heavy legume stacks are the safer pick. The Acana grain-free puppy formulas use moderate legume inclusions (peas in the 4–6 position rather than the top 3), which is meaningfully less DCM-suspect than formulations stacking peas + lentils + chickpeas in the top 5.
Coordinate with veterinary growth-monitoring. Per the AAHA 2022 Pediatric Care Guidelines, large-breed puppies benefit from quarterly veterinary visits through the first 18–24 months for body condition score, weight trajectory, and orthopedic palpation. Excess weight gain is the earliest warning sign of overnutrition; orthopedic discomfort or asymmetric weight-bearing is the earliest warning sign of developing developmental orthopedic disease. Catching either early allows feeding adjustment before the orthopedic issue progresses to surgical-intervention territory. Diet is the foundation; veterinary monitoring is the safety net.
Bottom Line
For puppies expected to exceed 70 lb adult body weight, Orijen Puppy Large (A/90) and Acana Puppy Large (A/90) are our top picks — both deliver the AAFCO Large Size Growth substantiation with calcium controlled at the 1.8 g per 1000 kcal AAFCO 2020 cap, plus high ingredient quality. Nulo Puppy (A/90) is the all-life-stages alternative with BC30 probiotic and L-carnitine. Wellness Puppy Large Breed (B/78) is the strongest value pick, and Hill’s Science Diet Large Breed Puppy (C/58) earns the clinical mention for feeding-trial-substantiated calcium control. The non-negotiable spec is AAFCO Large Size Growth substantiation on the bag — not generic puppy formulas. Per Hazewinkel 1985, calcium overnutrition during the rapid growth phase is causally linked to developmental orthopedic disease, and per Lauten 2006, slow growth produces sounder adults than fast growth. Plan to feed a Large Size Growth substantiated formula through 18–24 months for giant breeds, and recheck body condition score at every veterinary visit.
See more: Browse our full Best Dog Food by Condition: 2026 Cluster Index — senior life-stage and breed-condition guides organized into clinical clusters (cardiac, oncologic, dermatologic, gastrointestinal, orthopedic, endocrine, metabolic, dental, athletic) anchored on peer-reviewed primary literature.