Compare omega 3-6-9 for dogs products by what you can measure and verify.
1) Look for mg EPA+DHA per serving. Don’t settle for “omega-3s 1,000 mg” without a breakdown—ALA-heavy blends can inflate that number while contributing little EPA/DHA. A strong label clearly lists EPA (mg) and DHA (mg), then lets you total mg EPA+DHA.
2) Convert to per kg dosing. Take the daily mg EPA+DHA and divide by your dog’s weight in kg to see what you’re really delivering. If the label only gives “one pump for all dogs,” you’ll need to calculate servings per day by weight to avoid under-dosing large dogs or overdoing calories in small dogs.
3) Check oxidation safeguards. Fish oils oxidize; rancid oil is a quality problem. Prefer products that include vitamin E (mixed tocopherols) and use protective packaging (dark bottle, airless pump, or single-serve capsules). A recent manufacture date and clear “use within” guidance after opening also help.
4) Verify sourcing and testing. Look for fish species/sourcing transparency (e.g., anchovy/sardine) and a third-party test or COA that covers freshness/oxidation markers and contaminants. If a brand won’t provide testing details, it’s hard to judge quality beyond marketing.