What age is a senior dog?

There's no single birthday, but a good rule of thumb is that most dogs are considered senior from around 7 years. Body size is the biggest factor: large and giant breeds age faster and reach their senior years sooner, while small breeds get there later.¹ Because it's a gradual shift, it's more useful to watch for changes in energy, mobility, coat and appetite than to fix on one number.

Treat these as general guides, not fixed rules - your vet can tell you where your individual dog sits.

How a senior dog's needs change

Ageing isn't one change, it's several at once. Joints and mobility often become less springy. Skin can get drier and coats duller. Digestion and appetite may shift. Activity levels drop, which changes calorie needs. And many owners notice differences in sleep, alertness or habits. None of this is a disease in itself - it's the normal picture of getting older - but it does mean an older dog's diet and care are worth a fresh look.

Senior dog nutrition basics

The foundation is always a complete, balanced, age-appropriate diet - supplements sit on top of that, not in place of it. As dogs slow down, many need slightly fewer calories to avoid creeping weight gain, while still getting enough good-quality protein to hold condition.

Can a senior dog eat puppy food? Generally, no - puppy food is deliberately higher in calories and nutrients for growth, so it isn't a good long-term match for most seniors. It's better to feed an age-appropriate balanced diet and add targeted supplements for specific needs than to switch to puppy food. Your vet can advise for your individual dog, especially if weight or appetite is a concern.

Omega fatty acids for older dogs

Omega fatty acids are one of the most useful everyday additions for an ageing dog, and it helps to know there are two complementary sources. Plant omegas - omega-6 (linoleic acid) and omega-3 (ALA), plus GLA - come from oils like hemp seed oil and support the skin barrier and coat as part of a balanced diet.² Marine omegas - the long-chain EPA and DHA from fish oil - are the most bioavailable omega-3 and are the form most studied in older dogs.³

A simple way to think about it: a plant oil such as Hemp Nectar is an easy daily top-up of plant omegas for skin, coat and general wellbeing, while a fish-oil blend adds the marine EPA/DHA that features in the joint and cognition research below. Some senior owners use both.

Skin, coat & everyday wellbeing

Older skin tends to be drier and coats can lose some shine, and this is one area where daily nutrition quietly shows up. The plant omegas in hemp seed oil supply the essential fatty acids the skin barrier and coat draw on, fed as part of a balanced diet. We cover this in depth in our guide to hemp seed oil for your dog's skin and coat. It's everyday nutritional support, not a treatment for a skin problem - persistent itching or skin changes are a vet visit.

Joint & mobility support

Stiffer, slower movement is one of the most common things owners notice in older dogs. On the nutrition side, the research here is about marine omega-3 (EPA and DHA): several randomised trials in dogs with osteoarthritis have studied fish-oil omega-3 in relation to mobility and weight-bearing.⁴⁵⁶ That evidence concerns marine fish-oil omega-3 - the basis of HempPet's Mobility Supplement, which combines hemp with hoki fish oil and MCT - rather than the plant omegas in Hemp Nectar.

Important to keep in mind: this is general nutritional science about a fatty acid, not evidence that any supplement treats arthritis. Joint pain, limping or stiffness should be assessed by your vet. For more on the options, see our guide to joint supplements for dogs.

Cognition in ageing dogs

Some older dogs show changes in sleep, alertness or habits. There is a body of canine research examining marine omega-3 (EPA/DHA) and DHA-rich diets in relation to brain health in ageing dogs.⁸⁹¹⁰ As with joints, this research relates to marine fish-oil sources studied under clinical conditions, not to the plant omegas in hemp seed oil, and it is general science rather than a product outcome. Any noticeable change in an older dog's behaviour, memory or orientation should be checked by your vet.

What the research says - reading it the right way

Start low and go slow

Introduce any new oil gradually. Begin with a small amount for the first few days, then build up over one to two weeks. For hemp seed oil, the label guide is up to 1 mL per 5 kg of body weight per day, mixed into food, keeping total hemp oil to no more than 10 mL a day. Slightly softer stools at first can be normal; if you see loose stools, ease back and increase more slowly. Older dogs on medication or with a health condition should have any new supplement cleared with the vet first.

When to see your vet (and about Hemp Drops)

Good daily nutrition supports an older dog, but it isn't a substitute for veterinary care. Book a vet visit for weight loss, ongoing pain or limping, confusion or disorientation, appetite or drinking changes, or any sudden shift in behaviour - these are health signs, not nutrition tweaks. For any medical condition or concerning change in your senior dog, speak with your veterinarian. If you’re interested in CBD or cannabinoids, you can use the vet-guided Hemp Drops enquiry to learn about the next steps and explore that topic with veterinary guidance in Australia.

Which HempPet product for your senior dog?

Senior dogs often have more than one need, so here's a simple way to match the need to the product. All are nutritional support as part of a balanced diet - not treatments.

Frequently asked questions

What age is a dog considered senior?

Most dogs are considered senior from around 7 years. Large and giant breeds age sooner (sometimes 5–6), and small breeds later. It's a gradual change, so watch for shifts in energy, mobility, coat and appetite rather than a single birthday.

What supplements are good for senior dogs?

As part of a balanced diet, omega-rich oils support skin, coat and everyday wellbeing; marine omega-3 (fish oil) is often added for older dogs. Choose based on your dog's needs and check with your vet if they have a health condition.

Can a senior dog eat puppy food?

Puppy food is higher in calories and nutrients for growth, so it's not ideal long-term for most seniors. Feed an age-appropriate balanced diet and add targeted supplements rather than switching to puppy food. Ask your vet for individual advice.

Is hemp oil good for senior dogs?

Hemp seed oil adds daily omega-3 (ALA) and omega-6 (GLA) to a senior dog's meals to support skin, coat and everyday wellbeing. For extra marine omega-3, many owners choose a fish-oil blend. It's nutrition, not a treatment.

What omega is best for an older dog's joints?

Research in dogs points to marine omega-3 (EPA and DHA) for joint and mobility support. HempPet's Mobility blend combines hemp with hoki fish oil and MCT. Joint pain or stiffness should also be assessed by your vet.

Why is my senior dog losing weight but still eating?

Weight loss with a normal appetite can have several causes and should be checked by a vet - it's a health sign, not a nutrition tweak. Good daily nutrition supports condition, but this one needs a professional.