Gear Score Methodology
PetPal Gear Score
Best Joint Supplements and Fish Oils for Aging Dogs and Cats (2026)
Editorial synthesis of veterinary references and manufacturer documentation. Sources include the Merck Veterinary Manual chapter on osteoarthritis in dogs and cats, the 2022 AAHA Pain Management Guidelines for Dogs and Cats, the 2023 AAHA Senior Care Guidelines, NASC quality-program documentation, Tufts Cummings Petfoodology coverage of joint supplements and fish oils, peer-reviewed evidence including Roush 2010 and Bauer 2011, and official Nutramax, VetriScience, Welactin, Hill's, and Adequan product pages. PetPalHQ does not run a testing lab.
PetPal Supplement Score = (Expert Consensus × 0.35) + (Evidence Lane × 0.25) + (Ingredient Transparency × 0.20) + (Senior-Pet Routine Fit × 0.20)Factor breakdown
Expert Consensus
35%Synthesized from the Merck Veterinary Manual chapter on osteoarthritis in dogs and cats, the 2022 AAHA Pain Management Guidelines, the 2023 AAHA Senior Care Guidelines, NASC quality-program documentation, Tufts Cummings Petfoodology coverage, peer-reviewed evidence including Roush 2010 and Bauer 2011, and official manufacturer pages. PetPalHQ does not run a testing lab. The PetPal Supplement Score is a composite of expert OA-management criteria and manufacturer disclosures — not a clinical measurement.
Evidence Lane
25%Whether the product sits in the EPA/DHA lane (stronger support per Merck and Tufts), the green-lipped mussel lane (conditional per Tufts), or the glucosamine/chondroitin lane (mixed per Merck systematic review).
Ingredient Transparency
20%Whether the manufacturer discloses meaningful active concentrations — EPA/DHA mg per dose, glucosamine mg per chew, chondroitin mg per chew — rather than only total fish-oil mg or vague 'proprietary blend' framing. NASC seal participation is a screening signal, not proof of effectiveness.
Senior-Pet Routine Fit
20%Whether the product fits the realistic senior-pet workflow — sprinkle for cats, liquid for body-weight-scaled dosing, single-ingredient chew for trial windows without stacking — rather than forcing an owner into a routine they will abandon.
See all score methodologies on the Gear Score index.