Hip & Joint Dog PLUS contains the same four key joint nutrients as our Hip & Joint Dog (glucosamine, chondroitin, MSM and hyaluronic acid, at the same clearly stated levels) with serrapeptase, a natural enzyme, added. It's a powder made in the UK that you simply mix into your dog's food, from around 86p a day for a medium-sized dog.

Who it's for

Choose Hip & Joint Dog PLUS if your dog is:

• older and starting to stiffen up, especially first thing in the morning or after a long walk
• a working, agility or flyball dog whose joints take a lot of daily wear (see the competition note below)
• one you'd like to give serrapeptase alongside the four key joint nutrients

Not sure which supplement is right?

• Hip & Joint Dog: our everyday joint powder, with glucosamine, chondroitin, MSM and hyaluronic acid.
• Hip & Joint Dog PLUS: the same four nutrients at the same levels, with serrapeptase added.
• Max Strength / Max Strength Plus: a joint-support porridge that also includes our full Nourish + C multivitamin and mineral blend. Ideal if you'd like joint support and all-round nutrition in one.

What's in it (per medium-dog daily serving of 6.5g)

• MSM (methylsulfonylmethane): 2,500mg
• Glucosamine HCl: 2,500mg
• Chondroitin sulphate: 1,200mg
• Hyaluronic acid: 300mg
• Also contains serrapeptase

Protein 0%, Fibre 0%, Fat 0%, Crude Ash 3.9%

How long it lasts and what it costs

Sprinkle the recommended amount onto your dog's food and mix in, once a day.

Cost per day for a medium dog: 100g £1.58 · 200g £1.36 · 400g £1.04 · 800g 86p.
Subscribe: 50% off your first month, then 10% off every order, and you'll never run out.

A 5ml scoop is included with every order, inside the container (it can settle to the bottom, so do have a good look before contacting us). Let us know at checkout if you'd prefer not to receive a scoop with future purchases.

Frequently asked questions

How is Hip & Joint Dog PLUS different from Hip & Joint Dog?

Both contain glucosamine, chondroitin, MSM and hyaluronic acid at the same levels. PLUS has serrapeptase, a natural enzyme, added. It isn't a stronger dose: it's the same formula with one extra ingredient.

How soon will I notice a difference?

Every dog is different, but many owners tell us they see a change in their dog's movement after around three weeks of daily use. Give it at least a month before judging.

How long does a pouch last?

It depends on your dog's weight. A 200g pouch lasts a medium dog (15–40kg) 31 days, a small dog (up to 15kg) 44 days and a large dog (40kg+) 15 days. The full feeding table is above.

Is it suitable for competition and working dogs?

Yes. None of the ingredients are banned by the GBGB, IGB, ISDS, British Flyball Association, IFSS, the Kennel Club, UK Agility or BASC. Full details are below.

My dog is a fussy eater. Will they eat it?

It's a fine powder that mixes into your dog's usual food, and lots of our reviews mention dogs happily eating it. If your dog is wary of anything new, start with a smaller amount and build up over a few days.

Can I give it alongside medication?

If your dog takes medication, is injured or has an ongoing health condition, please check with your vet before using this supplement.

Can I claim for it on pet insurance?

Some of our customers have successfully claimed for this supplement through Petplan. Check your own policy, as cover varies.

Note for competition and working dogs

(Greyhounds, sheepdogs, flyball, sled dogs, agility, gundogs and more)

All the ingredients in our products are natural and contain no prohibited or banned substances. None of our ingredients are banned by:

• Great Britain Greyhound Board (GBGB)
• Irish Greyhound Board (IGB)
• The International Sheep Dog Society (ISDS)
• British Flyball Association (BFA)
• International Federation of Sleddog Sports (IFSS)
• The Kennel Club
• UK Agility (UKA)
• The British Association for Shooting and Conservation (BASC)

All Winston & Porter products are developed in line with European Pet Food Industry Federation (FEDIAF) and National Research Council (NRC) nutritional guidelines.

Good to know

♻️ Eco-conscious packaging: all our packaging, scoops and containers are fully recyclable, and we reuse boxes wherever possible to reduce our carbon footprint.

See how Hip & Joint Dog PLUS compares with other leading brands in our comparison chart.

Read more: Why it's a good idea for your dog to take a joint supplement · Best dog joint supplements UK (2026 guide)

Important information

• Contraindications: do not use if your dog has a known allergy, hypersensitivity or intolerance to any of the listed ingredients.
• Adverse reactions: if your dog becomes unwell after use, stop immediately and seek veterinary advice.
• Disclaimer: this is a nutritional supplement and is not intended to diagnose, treat, cure or prevent disease. Individual needs vary. If your dog is injured, has persistent stiffness or reduced mobility, or takes medication, speak to your vet before use. Always seek veterinary advice for ongoing health concerns.