Dog Symptom & Wellness Checker
Answer a few questions about eating, energy, mood and sleep. Get a wellness snapshot, an urgency level (routine, monitor, see a vet soon, emergency) and the guide to read next.
Check how my dog is doingEvidence-informed dog supplement comparison
Compare dog supplements with less guesswork.
Dog Supplement Facts separates what a supplement label claims from what published canine research shows — keeping seller information, our analysis, and independent evidence clearly apart.
Free tools:Dog Symptom CheckerBody Condition ScoreJoint Supplement Dose Checker
Educational decision support — not veterinary diagnosis or individualized advice.
Healthier dogs.Happier lives.
Dog health tools
Not sure where to start? Check your dog first.
Three free, quick tools. None of them diagnose — they help you judge how urgent things are, whether your dog's weight is on track, and whether a supplement label's dose matches the research.
Dog Body Condition Score Calculator
Three questions about ribs, waist and belly give a 1–9 body condition score on the WSAVA/Purina scale — the way vets judge whether a dog is underweight, ideal or overweight.
Is my dog overweight?Dog Joint Supplement Dose Checker
Enter your dog's weight and a label's amounts to see how the daily dose of glucosamine, UC-II or eggshell membrane compares with the dose used in published canine studies.
Check a label's doseExplore by topic
Start with the problem, then compare the options.
Each topic begins with the decision context. Product comparisons are published only when the underlying data and evidence review are ready.
Verified data live
Dog Joint & Mobility
Evidence-based comparison of dog joint & mobility supplements.
Evidence guide
Dog Skin & Coat
Evidence guide for dog skin & coat supplement ingredients.
Evidence guide
Dog Digestive
Evidence guide for dog digestive supplement ingredients.
Evidence guide
Dog Calming & Stress
Evidence guide for dog calming & stress supplement ingredients.
Evidence-based guides
Understand what matters before opening a product table.
Long-form guides are the foundation of the learning layer here: answer-first, evidence-aware, citation-ready, and linked to deeper analysis.
What actually matters when choosing a dog joint & mobility product?
Evidence-based comparison of dog joint & mobility supplements.
Read the Joint GuideWhat actually matters when choosing a dog skin & coat product?
Evidence guide for dog skin & coat supplement ingredients.
Read the Skin & Coat GuideWhat actually matters when choosing a dog digestive product?
Evidence guide for dog digestive supplement ingredients.
Read the Digestive GuideWhat actually matters when choosing a dog calming & stress product?
Evidence guide for dog calming & stress supplement ingredients.
Read the Calming GuideHow we separate the evidence
Product information and scientific evidence are not the same thing.
We keep the main information layers visible so a marketplace signal is not mistaken for a scientific conclusion.
Product listing
Captured identity, listed ingredients, form, and seller-described product focus.
Comparison context
Structured price position, relative popularity where approved, and decision-relevant product differences.
Scientific evidence
Independent research assessed separately, with preference for species-relevant clinical evidence in dogs.
Limitations
Ingredient or formula evidence does not prove that every commercial product containing it will produce the same outcome.
Featured scientific evidence
Explore the evidence behind common dog joint supplement ingredients.
We review ingredient- and formula-level research separately from seller claims and product popularity. These summaries highlight what current evidence supports, where findings are mixed, and where important limitations remain.
Does Glucosamine Help Dogs With Osteoarthritis?
Does glucosamine help dogs with osteoarthritis? Canine trials give mixed results, and most test glucosamine with chondroitin rather than glucosamine alone.
Read evidenceOmega-3 Fish Oil for Dogs With Osteoarthritis: What Does the Evidence Show?
Fish oil for dogs with arthritis has several controlled trials, but some tested diets rather than oil. Compare EPA and DHA milligrams, not total oil.
Read evidenceUC-II for Dogs: Dosage, Evidence, and How to Read the Label
UC-II dog trials used a fixed 40 mg ingredient dose, not mg of active collagen and not a per-kg dose. How to read the label and what the studies found.
Read evidenceGreen-Lipped Mussel for Dog Joint Health: What Do Studies Show?
Green-lipped mussel (GLM, Perna canaliculus) beat placebo on some dog joint scores and was less effective than carprofen. Powder and extracts are not the same.
Read evidenceTurmeric and Boswellia for Dogs With Arthritis: Why Extract and Formula Identity Matter
The main turmeric trial in arthritic dogs missed its force-plate outcome, and Boswellia data are uncontrolled. What the studies show and why extracts differ.
Read evidenceEggshell Membrane for Dogs With Osteoarthritis: Evidence and Uncertainty
Eggshell membrane reduced pain in some dog trials at some time points, but not consistently. The studies, the dose used, and how to check a label.
Read evidenceWhy this site
Comparison without pretending there is one universal "best."
The site is designed to help readers understand tradeoffs, not to turn one marketplace metric or one study into a blanket recommendation.
No paid ranking logic
Popularity and price positioning are descriptive comparison signals, not recommendations or scientific-strength scores.
Evidence with boundaries
Support for an ingredient or related formulation is not treated as proof that every product containing it works.
Corrections are part of the process
Readers can report listing errors, scientific corrections, or newer studies through the public contact route.
Scientific review
Hoàng Quốc Chính, PhD
Scientific Reviewer · Founder & Director, Institute of Traditional Medicine Biochemistry
This role is not veterinary clinical review and does not constitute veterinary diagnosis or individualized veterinary advice.
Start with your question
Choose a topic before you choose a product.
Read the category guide first, then open the comparison when you are ready to look at formulas, formats, popularity context, and evidence side by side.