The scores
Merrick Classic Healthy Grains Puppy Chicken & Brown Rice: B (78/100) — Very Good. Deboned chicken + chicken meal as the first two ingredients deliver real named-protein density, and the grain stack (brown rice, barley, oat meal) is a clean ancient-grain approach.
Canidae PURE Puppy Real Chicken, Lentil & Whole Egg: B (78/100) — Very Good. Chicken + chicken meal lead the formula, and the PURE-line limited-ingredient philosophy keeps the deck tight at 8–10 core ingredients plus the vitamin/mineral premix.
How the ingredients compare
The top five ingredients:
Merrick Puppy: Deboned Chicken, Chicken Meal, Brown Rice, Barley, Oat Meal
Canidae PURE Puppy: Chicken, Chicken Meal, Lentils, Peas, Garbanzo Beans
Both formulas stack two forms of chicken (fresh + meal) in positions one and two — the single best signal of real named-protein density in a puppy kibble. They diverge immediately after. Merrick fills positions three through five with three ancient grains (brown rice, barley, oat meal), a time-tested carbohydrate structure that’s easy on puppy digestion and delivers manganese, selenium, and fiber without relying on legumes. Canidae PURE pivots to a grain-free architecture, using lentils + peas + garbanzo beans across positions three through five.
The grain-free + legume-heavy approach is relevant because of FDA’s 2018–2022 investigation into canine DCM (dilated cardiomyopathy) and a possible link to legume-rich grain-free diets in non-predisposed breeds. The investigation didn’t establish causation, and most cardiologists now frame it as a nutritional association rather than a direct cause. But for owners of at-risk breeds (Golden Retrievers, Doberman Pinschers, Great Danes, Newfoundlands, Cocker Spaniels), grain-inclusive formulas are the safer default during the growth window.
Further down, Merrick adds chicken fat, pork meal, salmon meal, natural flavor, flaxseed, blueberries, apples, and a premix heavy on DHA (for puppy brain development) and glucosamine/chondroitin. Canidae adds menhaden fish meal, canola oil, whole egg, sun-cured alfalfa meal, and a similar DHA + joint-support premix. Both hit the puppy-specific checkpoints — DHA from salmon/menhaden, calcium:phosphorus ratios appropriate for growing dogs, protein floor above 28%.
Where Merrick Puppy pulls ahead
Grain-inclusive safety profile: For puppies of DCM-predisposed breeds, a grain-inclusive formula is the cardiologist-recommended default. Merrick Classic Healthy Grains was specifically designed as the grain-inclusive alternative to Merrick’s grain-free lines for owners who wanted that reassurance.
Three named animal proteins across the full ingredient list: Beyond chicken + chicken meal, Merrick adds pork meal and salmon meal in mid-list positions, delivering protein diversity (important for amino acid profile) without legume stacking.
Deboned chicken first: Named fresh chicken as the first ingredient matches the labeling convention most puppy-buying owners expect, backed by chicken meal immediately after. Shop on Amazon →
Where Canidae PURE Puppy holds its own
Limited-ingredient discipline: The PURE line is engineered around the “fewer-ingredients-means-fewer-variables” philosophy. For a puppy who comes home with a sensitive digestive system or a suspected food allergy, fewer ingredients means faster troubleshooting if an issue develops.
Whole egg in the formula: Canidae PURE Puppy prominently features whole egg, which is a complete protein with the highest biological value of any common food protein. Merrick uses chicken-family proteins but doesn’t list egg in the top ingredients.
Menhaden fish meal for DHA: Canidae sources DHA from menhaden fish meal, a cleaner marine protein with lower mercury exposure than broader fish meal blends. Salmon meal in Merrick also supplies DHA but carries slightly higher environmental-contaminant variability. Shop on Amazon →
The bottom line
For at-risk breeds (Goldens, Dobermans, Great Danes, Newfoundlands, Cocker Spaniels) or owners who want to play it safe with grain-inclusive nutrition during the growth window, Merrick Classic Healthy Grains Puppy is the right pick. For puppies with a sensitive digestive profile or owners who specifically want a limited-ingredient grain-free formula, Canidae PURE Puppy delivers a tight ingredient deck with real protein density. Neither choice is wrong — both are B-grade puppy formulas from brands with deep quality-control reputations. For more picks, see our guide to the best dog food for large breeds.