Fish oil gives dogs two omega-3 fatty acids, EPA and DHA, and it has some of the strongest research behind it of any joint supplement. Joint chews usually carry different ingredients, such as glucosamine, chondroitin and MSM. So the real question often isn't which one to pick, but whether your dog's plan calls for one, the other or both, and that's worth settling with your vet.
Everhound Hip & Joint is a joint chew, not a fish oil. Each chicken-flavor soft chew carries glucosamine HCl, MSM, chondroitin sulfate and five other actives, but no fish oil, so if your vet recommends it, it would be a separate product alongside the chew.
What fish oil does for dog joints
Veterinarians use fish oil for a range of conditions, and VCA's fish oil guide lists arthritis and joint problems among them, describing EPA and DHA as anti-inflammatory agents. Cornell's Riney Canine Health Center goes further, calling omega-3 fatty acids from fish oil the supplement with the most support in the research so far.
The source of the omega-3 matters. CARE (Canine Arthritis Resources and Education) explains that dogs can't make enough use of the plant omega-3 in flaxseed, linseed or canola oil for it to help with osteoarthritis; they need marine omega-3s. That's why a chew that lists flaxseed among its ingredients, ours included, isn't a stand-in for fish oil.
CARE also adds an honest caveat: the strongest evidence is for prescription joint diets enriched with omega-3s, and the evidence for fish oil supplements on their own is more limited. Your vet can tell you which route suits your dog.
Fish oil vs joint chews: what each one brings
| Fish oil | Joint chew (Everhound Hip & Joint) | |
|---|---|---|
| Main ingredients | Omega-3s EPA and DHA from fish | Glucosamine HCl, MSM, chondroitin sulfate, vitamins C and E, turmeric root, yucca extract, egg shell meal |
| Who sets the amount | Your vet, from your dog's weight and the product's EPA and DHA content | The label, by your dog's weight |
| Usual forms | Liquid or capsule | Soft chew |
| Calories | Fat, so calorie-dense | A small amount per chew |
| Common side effects | Mild stomach upset, fishy odor, slower wound healing (VCA) | Mild gas or soft stools are the ones VCA lists for glucosamine and chondroitin |
Because they carry different ingredients, the two aren't interchangeable. If you're still weighing formats within joint supplements, our guide to joint chews vs powder vs liquid covers that choice.
Can dogs take fish oil and a joint chew together?
Often, yes. Cornell's sports medicine experts describe recommending fish oil together with a glucosamine-and-chondroitin product, and they say fish oil should generally be given as its own product to reach the right amount for joints. A few things are worth checking with your vet first:
- Medications. VCA lists NSAIDs and blood thinners among the drugs to combine with it carefully. Cornell notes that fish oil may help lower the NSAID dose a dog needs. Only your vet can balance those.
- Weight. Fish oil is fat, and Cornell's sports medicine section chief says he never recommends it for overweight dogs because of the calories.
- Health history. VCA advises caution with it for dogs with clotting disorders, diabetes, a history of pancreatitis or diarrhea, and for pregnant or nursing dogs.
- Duplicate products. Make sure you're not also giving a second joint chew with the same ingredients.
Bring both labels to the appointment. Our list of questions to ask your vet about joint chews makes a handy checklist. And if your dog suddenly limps, cries out or can't stand, skip the supplement aisle and see a vet now.
How much fish oil for a dog's joints?
Fish oil is dosed by its EPA and DHA content, not by the spoonful, because concentration varies a lot between products. Here's how veterinary sources frame it:
- CARE gives a typical target of about 100 mg of combined EPA and DHA per kilogram of body weight per day, within a reported range of 50 to 220 mg/kg.
- Colorado State University's dosing chart, written for veterinarians, sets a maximum for dogs with osteoarthritis and suggests starting at about a quarter of it and building up slowly, watching for loose stools or vomiting.
- Cornell cites a rough rule of 1 teaspoon per 20 pounds of ideal body weight, while noting that product strength varies.
Use these as background for a conversation with your vet, not as a recipe; your vet can turn them into an amount for the bottle you buy. None of these figures apply to joint chews. Everhound's serving comes from the weight bands on our label, explained in our guide to giving joint chews with food.
Choosing a fish oil for joints
There isn't one best oil for every dog, but a few things separate a useful product from a disappointing one:
- EPA and DHA on the label. Look for milligrams of each per serving, so you and your vet can do the math.
- Made for dogs. PetMD points out that human fish oils are dosed for people and can contain extra ingredients that are toxic to pets, such as xylitol. CARE takes a softer line and says some human marine products without vitamin D can be used. Ask your vet about the exact bottle.
- A reputable maker. VCA advises skipping it when a reputable source can't be found, because some products carry a risk of heavy metal contamination.
- Proper storage. Keep it cool, dry and out of the light, and follow any refrigeration instructions on the label.
Where a daily joint chew fits
If your vet's plan includes a glucosamine-based chew, Everhound Hip & Joint is a chicken-flavor soft chew made cold in the USA, with eight named actives and a weight-based serving. It offers daily joint support next to any fish oil or medication your vet recommends. The research on its ingredients is on our science page.
Wondering why your vet raised supplements in the first place? Read why vets recommend joint supplements for dogs.
FAQs
Is it okay to give my dog fish oil every day?
Yes, if your vet has recommended it. It's normally given daily at the amount on the product your vet approved. Watch for stomach upset or a fishy smell, which VCA lists as common, and call your vet if a problem continues.
How long does fish oil take to help joints?
VCA says it may take several weeks before full effects are seen, and CARE notes it takes about two months for omega-3s to become part of the body's cell membranes. Give it time and keep your vet updated on how your dog is moving.
Does a joint chew with added omega-3s replace fish oil?
Usually not. Cornell's experts say fish oil should generally be given as a separate product to get the right amount for joint health, and note that chews containing omega-3s usually don't hold much. Check the EPA and DHA per serving before counting on a combined product.
Will fish oil make my dog gain weight?
It can add up. CARE points out that fish oil is a fat and calorically dense, so ask your vet whether to adjust your dog's food when you add it.