💊 Health supplements
The pet supplement market is worth €1.5 billion globally and most of it is questionable. A handful do have real evidence — joint support, omega-3, probiotics. Most others are placebo (for the owner). Here's what to give and when, what to skip, and when to ask the vet before adding anything.
Photo: Honest Paws / Unsplash
Best evidence for arthritis pain reduction in dogs over 7 (or younger large breeds). Look for green-lipped mussel (Antinol) + glucosamine sulphate (not HCl) + chondroitin. Takes 4–6 weeks to feel a difference. Brands trusted by IE vets: YuMOVE, Antinol, Nutramax Cosequin.
Anti-inflammatory effect — useful for skin allergies, arthritis, kidney disease. Wild-caught fish oil (sardine, anchovy) over algae for dogs. Avoid flaxseed (dogs convert ALA → EPA poorly). Refrigerate after opening — rancid oil is harmful.
Useful during/after antibiotics, after dietary upset, or for dogs with chronic loose stools. Pick canine-specific strains (Enterococcus faecium, Bifidobacterium) — human probiotics often don't survive dog digestion. ProKolin+, Fortiflora are vet-recommended.
Useful for fireworks, vet visits, car sick dogs. Zylkene (alpha-casozepine) and Adaptil collars/diffusers have OK evidence. CBD is unregulated for pets in IE — skip until safety/dose data improves. For severe anxiety, talk to a vet about prescription options.
A complete commercial diet (anything labelled "complete and balanced" to FEDIAF / AAFCO standard) provides everything a healthy dog needs. Multivitamins are useful for: home-cooked diets, raw diets, dogs with malabsorption. Ask the vet first — over-supplementing fat-soluble vitamins (A, D, E, K) is harmful.
Especially if your dog is on prescription medication, has kidney/liver disease, is pregnant, or is under 1 year old. Some supplements (high-dose omega-3, glucosamine, calming aids) interact with medications.
The National Animal Supplement Council seal means independent quality testing. Without it, the actual content of a supplement may be wildly different from the label (a 2024 audit found this in 30% of OTC pet supplements). Brands sold via vet practices are usually held to a higher bar.
A scoop dosed for a Labrador is wildly wrong for a Chihuahua or a Great Dane. Read the per-kg dose on the pack and weigh the supplement. Round down, not up.
Joint supplements, omega-3 and probiotics take time to build to therapeutic levels. If you stop after 2 weeks because "it's not working", you wasted the build-up phase. Reassess after 8 weeks; if no improvement, swap the brand or stop.
CBD (unregulated in IE), turmeric/curcumin (poor bioavailability in dogs), apple cider vinegar (no evidence + dental erosion), homeopathic remedies (water), most "immune boosters" (no defined mechanism). Stick to the evidence-backed list above.
Our dog health supplements range goes live as we vet suppliers — we won't list anything we wouldn't use ourselves. In the meantime, our calculators, breed guides and AI vet tools below are free and don't need stock.
Most healthy puppies on a complete puppy food don't need them. Large + giant breeds (Great Dane, Mastiff, Newfoundland) sometimes benefit from glucosamine from 6+ months because of growth-stress on developing joints. Ask the vet at the first health check.
Yes if it's pure fish oil (no flavourings, no xylitol, no other additives). Read the label — many "human" omega-3 products are blended with herbs that aren't safe for dogs. Dose by EPA+DHA content, not by capsule count. Refrigerate after opening.
No. "Natural" means a plant or extract, not "safe". Garlic, grapes, nutmeg, macadamia, xylitol are all natural — and toxic. Pharmaceutical drugs go through testing for safety + efficacy + dosing; most supplements don't. The bigger question is appropriateness for your dog, not natural-vs-synthetic.
Most dogs benefit from 6 onwards (large breeds from 5). Earlier if there's already arthritis on imaging or a history of injury / dysplasia. Combine with omega-3, weight management, and joint-friendly exercise (swimming, hydrotherapy). Severe arthritis needs prescription pain relief in addition (Galliprant, Carprofen, Librela).
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