How long do diabetic dogs live? Life expectancy after diagnosis

How long do diabetic dogs live?

In a British study of diabetic dogs seen in ordinary vet practices, dogs that lived at least 7 days after diagnosis had a median survival of 20.2 months. A median means half the dogs lived longer than that. An older Swedish study of insured dogs aged five to twelve found a similar middle: leaving out the dogs that died within 1 day of diagnosis, the median survival was 2 years.

A study from a referral hospital in Italy reported a longer median of 32 months. Referral hospitals see a different group of dogs from ordinary practices, so that figure may not reflect most dogs.

The newest vet guidelines for diabetic dogs say the outlook is favourable with proper treatment and monitoring, that over time the diabetes is controlled in most dogs, and that many dogs live comfortably with it for the rest of their lives.

Those figures come with catches. They count deaths from any cause. The typical dog in the British study was about ten years old when he was diagnosed, and older dogs had a higher risk of death, so age is part of the picture. The records still tied most of the deaths to the diabetes, and most of them were euthanasia decisions.

Why the first weeks matter most

In the Swedish study, about a quarter of the dogs died within a day of the first diabetes claim, which is why the researchers also reported a median with those dogs left out. The British researchers did the same with the first week. Some of those early deaths were dogs whose owners chose euthanasia at diagnosis.

Ketoacidosis is life-threatening. It's more common in a dog who has only just been diagnosed, and it can also happen in a dog who is already on insulin. Infections, pancreatitis, Cushing's disease and kidney disease can set it off. If he's weak, vomiting or not himself, call your vet now.

The guidelines say that over time the diabetes is controlled in most dogs. While his routine is still settling, call your vet the same day if he's weak, vomiting or not eating. Starting out with a diabetic dog covers those first weeks step by step.

What affects how long a diabetic dog lives

In the British studies, a few things were linked to shorter survival, and the vet guidelines add one more. None of them is a verdict on your dog, but they're worth knowing.

His age. Older dogs had a higher risk of dying after diagnosis.

Pancreatitis. Dogs diagnosed with pancreatitis had a higher risk too. Food after pancreatitis explains how it changes his meals.

Sugar at diagnosis, and steroids beforehand. Very high sugar when he was diagnosed, and steroid treatment before it, were linked to shorter survival.

Not starting insulin. Dogs who started insulin had a much lower risk of death. The group who never started it included families who chose euthanasia at diagnosis.

Other illnesses. The vet guidelines say Cushing's disease and infections can make diabetes harder to control and often set off ketoacidosis. Tell your vet if you suspect either. Diabetes and Cushing's and diabetes alongside serious illness have more.

What you can control

The vet guidelines put it plainly: diabetic dogs can live a good quality of life with few or no signs, when owners and vets keep up with care, monitoring, diet, routine and follow-up checks.

Keep his days steady. The same food, meals and insulin at the same times, and nothing changed without your vet. The twelve-hour day shows a simple way to set that up.

Keep notes. A few lines a day about food, water, peeing, energy and anything odd give your vet something real to work with. Home testing, glucose curves and notes for your vet shows how.

Go to the rechecks. Diabetes changes over time, and the checks are how your vet knows when his treatment needs to change.

Know the two emergencies. A low and ketoacidosis are the two that can turn bad quickly, and acting fast matters. Low blood sugar in dogs and diabetic dog vomiting cover what to watch for.

How long can a dog live with diabetes untreated?

There's no safe stretch of time to leave it. Insulin is what lets his body use the sugar from his food, and untreated or poorly treated diabetes can turn into diabetic ketoacidosis, which is life-threatening. If your dog has been diagnosed and isn't on treatment yet, call your vet today.

In the British study, dogs who never started insulin had a much higher risk of death.

If treatment feels like too much for you, say so to your vet. There are real options, and what if I can no longer manage my dog's care? talks through them.

What about cataracts?

Cataracts are common in diabetic dogs, especially when the diabetes isn't well controlled, and they can cloud his sight, from a slight blur up to blindness.

They're about his eyes, but they still matter for the bigger picture: in the British study, eye problems were part of the reason for some of the euthanasia decisions. If you notice cloudy eyes or he starts bumping into things, talk to your vet early. Painful or cloudy eyes covers what to look out for.

The longest-living diabetic dogs

You'll find stories online of diabetic dogs living for many years after diagnosis. Some dogs really do: the vet guidelines say many dogs with diabetes live comfortably with it for the rest of their lives. Most of those stories I can't check, but one I can. Lottie, a terrier in England, was diagnosed at ten and was sixteen, six years on insulin, when Pets Magazine told her story in 2018. Her owner works for a company that makes pet insulin, so read it as one dog's story, not a promise. But it gives me hope, and I hope it gives you some too.

If you searched for type two diabetes in dogs: dogs usually get a form of diabetes where the body has lost the cells that make insulin, so most diabetic dogs need insulin for life. Can a diabetic dog go into remission? explains the rare exceptions.

Questions to ask your vet

Your vet can't promise you a number either, but they can tell you far more about your dog than any study. These are worth asking:

How is he doing compared with when he was diagnosed? Is anything else going on, like pancreatitis, an infection or Cushing's, that changes the picture? What would tell us his diabetes is slipping? What should make me call the same day? What's realistic for him, and what would a good day look like?

What is the outlook for a diabetic dog? has more on that conversation, and signs a diabetic dog is dying covers the harder questions near the end.

Why dogs don't live as long as we do

There's a story owners have passed around for years about a family saying goodbye to their dog, Belker. Afterwards, their six-year-old son explains why dogs don't need to live as long as we do.