The scores
Orijen Puppy: A (90/100) — Chicken, turkey, chicken liver, salmon, whole herring. WholePrey organ/bone ratios, salmon and herring for dense DHA, five-strain probiotics, functional botanicals.
Orijen Original: A (90/100) — Chicken, turkey, chicken giblets, whole herring, whole hake. Same WholePrey model, ingredient density optimized for adult maintenance rather than growth.
How the ingredients compare
Puppy: Chicken, Turkey, Chicken Liver, Salmon, Whole Herring
Original: Chicken, Turkey, Chicken Giblets, Whole Herring, Whole Hake
Both lead with chicken and turkey in positions one and two — identical protein anchor. The puppy formula elevates chicken liver to position three (nutrient-dense organ meat with concentrated vitamin A, B vitamins, and iron — essential for rapidly growing tissue). The adult formula uses chicken giblets (liver, heart, gizzard mix) at position three — similar nutritional function but a different organ blend. Salmon and whole herring appear in both formulas; the puppy formula leans on salmon slightly more heavily, while the adult formula includes whole hake for additional marine-source protein diversity.
Where the Puppy formula differs
Chicken liver in position #3: Pure organ meat delivering the most nutrient-dense ingredient in Orijen Puppy's top five. For puppies whose iron demand is elevated during rapid red blood cell production and whose vitamin A demand is elevated during tissue differentiation, liver is near-optimal. The adult formula uses chicken giblets (a blend) — nutritionally similar but slightly less concentrated in specific growth-supporting nutrients.
Elevated calcium for bone development: Orijen Puppy publishes calcium guarantees around 1.4% dry matter — within the AAFCO puppy growth range. The adult formula runs slightly lower. For growing puppies building skeletal mass, the puppy formula's calcium profile is AAFCO-tuned for puppy growth requirements. Large- and giant-breed puppy owners should still verify the Ca:P ratio with a vet.
Higher fat percentage: Orijen Puppy runs approximately 20% fat on the guaranteed analysis vs ~18% for Orijen Original. Growing puppies benefit from the denser caloric content to support metabolic demand during weight gain. Chicken fat and pollock oil deliver both the caloric energy and the essential fatty acid profile (omega-6 and omega-3) puppies need. Shop on Amazon →
Where the Original formula differs
Whole hake in position #5: Adds a fifth named animal protein in the top five (chicken + turkey + chicken giblets + whole herring + whole hake). For adult dogs with higher amino acid variability tolerance, the broader protein diversity supports sustained lean muscle and immune function. The puppy formula focuses on three poultry sources + salmon + herring.
Optimized for long-term maintenance: Orijen Original is formulated for adult dogs in the 1–7 year range (though labeled "all life stages"). Its nutrient profile prioritizes sustainable maintenance nutrition rather than the elevated growth support of the puppy formula. Calcium is slightly lower, fat is slightly lower, and caloric density is tuned for less demanding metabolic needs.
Functional botanicals are identical: Turmeric, sarsaparilla root, althea root, rosehips, juniper berries — both formulas carry the same polyphenol and anti-inflammatory botanical package. This is Orijen's consistent brand signature across life stages. Shop on Amazon →
The bottom line
This is a life-stage decision, not a quality decision. For puppies under 12 months (or under 18 months for large/giant breeds), Orijen Puppy is the right choice — the elevated calcium, protein, and fat align with growth-stage requirements. For dogs 12+ months (18+ for large/giant breeds), Orijen Original is the right choice — the maintenance profile serves sustained lean muscle preservation without the elevated nutrient load that could stress aging systems. Both earn the same A/90 score — same top-tier ingredient quality, different life-stage tuning. DCM-susceptible breed owners (goldens, cockers, Dobermans, Great Danes) should discuss grain-free formulas with their vet before committing long-term.