This is a specific conversation about Dog supplements — what's actually worth it — ask about yours and get one honest answer for your exact situation.
inparticular.ai
Your vet has already done the hard work here — omega-3s are one of the few supplements with solid evidence behind them, especially for larger breeds at eight years old where joint inflammation and heart health both start to matter. Before I point you at a specific product, a couple of quick questions: is your vet's recommendation linked to anything in particular — stiff joints, a skin condition, a cardiac check — or was it more of a general preventive suggestion? And is your Rottweiler on a dry kibble, raw, or wet food diet?
It was after a routine check, she mentioned his joints looked a bit stiff when he came in. He's on dry kibble, a decent brand I think — Eukanuba Large Breed.
inparticular.ai
That makes a lot of sense. Eukanuba Large Breed does contain some omega-6, but like most kibbles it's light on omega-3 — specifically EPA and DHA, which are the anti-inflammatory ones that actually help with joint stiffness. You want a proper fish oil rather than a general supplement, and you want the EPA and DHA dose to be meaningful for a dog his size. For an 8-year-old Rottweiler, you're looking at roughly 2,000–3,000mg of combined EPA and DHA per day. How much does he weigh roughly?
He's about 48kg, quite a big lad.
inparticular.ai
Perfect, that's exactly what I needed. At 48kg with joint stiffness as the primary concern, I'd go with Nordic Naturals Omega-3 Pet — it comes in a liquid bottle, it's made specifically for dogs, and it's third-party tested for purity and heavy metals which matters a lot with fish oil. One teaspoon gives you around 850mg of EPA and DHA, so at his size you'd do two teaspoons a day, which is easy to drizzle over his kibble. Most dogs take to it well because it's purified so it doesn't smell as strong as cheaper oils. It's available on Amazon UK and works out better value per dose than capsule formats for a big dog.
Is there anything cheaper that would still do the job, or is it worth paying more for that brand?
inparticular.ai
Honestly, fish oil is one area where I'd stick with a reputable brand. The cheaper supermarket or unbranded fish oils often don't list the actual EPA and DHA content clearly, which means you're guessing on dose — and some have been found to contain oxidised oil or trace contaminants. Nordic Naturals is the one brand that consistently passes independent testing. For what you're giving it for — a specific vet-flagged concern in a large older dog — I wouldn't cut corners here. The cost difference over a month is fairly small compared to what you'd pay for it not to work.
That's fair enough. How long before I'd expect to see any difference in his joints?
inparticular.ai
Most owners report noticing something around the six to eight week mark — a bit more willingness to get up, easier on stairs. The anti-inflammatory effect builds up over time as the EPA and DHA accumulate in tissue, so it's not a fast fix. I'd give it a solid eight weeks before deciding whether it's making a difference, and mention it at his next vet check so they can compare how his joints feel on examination.
