How to Help Your Dog Live Longer: 4 Rules for Older Dogs

As much as we would love to have our dogs live forever, it's not possible. But you can help an older dog live longer — and feel a lot better along the way. And it starts before they are older.

Dogs don't fall apart in old age overnight. They lose a little each year. A bit of muscle. A bit of spring in the step. Most of us only notice when the dog stops jumping into the car, or won't jump up on the couch anymore, or lags behind when going on their favourite walking track.

I keep coming back to 4 rules if you want your pups to be healthy and happy in their later years.  After more than two decades in clinical practice, I keep coming back to the same four things. They aren't complicated, and they don't require a lot of money. But they do require consistency.

Keep them lean.
Keep them moving.
Feed them for muscle.
Fill the gaps with the right supplements.

Let me take them one at a time.

How Lean Should an Older Dog Be?

Lean. Leaner than most owners think.

Here's the simple test: you should be able to see the last rib, with a nice trim tummy behind it. You shouldn't be able to see all the ribs — that's too lean. But if you can't feel the ribs easily at all, your dog is carrying too much weight.

The best evidence for this comes from a long-running study of 48 Labradors. Half were fed 25% less than their littermates for their entire lives. The leaner dogs lived a median of 13 years, compared to 11.2 years for the dogs that ate more. That's 1.8 years of extra life!

The lean dogs also developed arthritis later. By age 10, 42% of the lean group had hip arthritis — compared to 79% in the heavier group.

It's one breed and a relatively small sample, so treat it as a strong pointer rather than a guarantee. But it's the best data we have, and it also lines up with what I see in clinic week to week.

The good news? Overfeeding is the easiest thing on this list to fix:

Measure the meals.

Count the treats.

Older dogs need around 25% fewer calories than they did in their prime, according to one veterinary nutrition review. Small adjustments, made consistently, add up.

How Much Exercise Does an Older Dog Need?

Shorter sessions, more often. That's the shift.

A young dog can handle long, hard runs and bounce back the next day. An older dog can't — and asking too much of them too often is one of the main ways joint problems get worse faster. Ten- fifteen minutes a day, every day, beats two hours once or twice a week.

Let them sniff. Let them set the pace. As joints get stiffer, ease off the high-impact activities — but don't stop moving altogether. Gentle, regular movement is one of the most powerful things you can do for an ageing dog.

In a study of more than 11,000 older dogs, the less active ones showed more signs of canine cognitive dysfunction — the dog equivalent of dementia. The study can't confirm which causes which; a cognitively affected dog may simply choose to move less. But I'd rather keep my dog moving and find out, rather than wait and wonder.

Exercise won't make a dog live forever on its own. What it does do is help keep the weight down, the joints mobile, and the muscle on — and all three of those things matter.

Keep their joints mobile is also helpful to keep them active and flexible. For tips on stretching exercises check out this article and video on how to do some basic stretches for your own pup here.

What Should an Older Dog Eat?

Mostly protein. The approach I use in clinic — and at home — is roughly 80% protein, 15% vegetables, and 5% carbohydrate.

Here's why protein matters so much as dogs age: older dogs lose muscle, but that doesn't mean they can't put it back on or keep it in the first place.

 In a seven-week study, senior dogs fed a 32% protein diet retained significantly more lean mass than those fed 16% protein. The research is clear — cutting protein doesn't protect a healthy older dog's kidneys. What it can do is cost them muscle.

Dogs with kidney or liver disease are a different story, and you should always follow your vet's guidance in those cases. But for a healthy older dog, keeping protein high is one of the most impactful dietary decisions you can make.

Check the muscle yourself at home. Run your hands along the spine and over the hips — that's where muscle loss tends to show up first. If you're feeling more bone than you used to, mention it to your vet. Rapid muscle loss can be a sign of something else going on (pain, arthritis or someother internal issue).

Whatever you're feeding, make sure the diet is complete and balanced overall.

Do Older Dogs Need Supplements?

I think they can genuinely help — but food does most of the work. Supplements are about filling the gaps that appear as a dog ages, not replacing a good diet.

The gut changes with age. One study found that older Beagles had lower levels of certain gut fermentation products and fewer immune cells compared to younger adults. Another found that healthy dogs up to age 14 digested their food about as well as younger dogs. So it varies considerably from dog to dog.

That's why I focus on three things:

• A good probiotic — to support the gut microbiome and immune function
• Digestive enzymes — to support efficient digestion as the gut changes
• A joint supplement, especially if your dog is active or showing early signs of stiffness — omega oils such as fish oil, green lipped mussels or emu oil can be helpful, along with glucosamine, or collagen. If you're already dealing with painful or stiff joints, consider adding boswellia, rosehip and/or curcumin (turmeric).

Supplements support a good diet. They don't replace one.

If your dog is on medication, always check with your vet before adding anything new.

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