Diabetes in Older Dogs

Most often, diabetes in older dogs is identified as Diabetes Mellitus, and happens because your dog’s pancreas becomes unable to produce enough insulin to maintain healthy blood sugar levels.

Senior Pug

Dog diabetes is similar to human diabetes in some ways, and different in others.

If you want to make a comparison, you’ll find that canine diabetes is somewhat like Type I diabetes in humans.

Canine Diabetes Mellitus is usually not seen in younger dogs (those less than 4 or 5 years old), and symptoms most often become noticeable in dogs who are considered to be middle-aged or older.

It’s also more common in female dogs than in males, and unspayed females are more at risk than spayed females.

As with many diseases, some purebred dogs seem to have a predisposition to developing Diabetes during their lifetime.

Dog breeds who have an above-average chance of developing canine diabetes include (but may not be limited to):

  • Alaskan Malamute
  • Australian Terrier
  • Beagle
  • Bichon Frise
  • Cairn Terrier
  • Chow Chow
  • Dachshund
  • Doberman
  • Finnish Spitz
  • Fox Terrier
  • Golden Retriever
  • Keeshond
  • Miniature Pinscher
  • Old English Sheepdog
  • Poodle
  • Pug
  • Puli
  • Samoyed
  • Schnauzer
  • Springer Spaniel
  • West Highland Terrier
  • Yorkshire Terrier

Mixed breed dogs may be less likely to become diabetic, but they are not immune to developing the disease.

Canine Diabetes is not very common, but it is on the rise (as it is in humans).

Although there are no firm stats on the incidence of diabetes in dogs, estimates range from between 1 in 100 to 1 in 500 dogs being affected (at max that is 1% of all dogs).

However, studies show that over the past five years, there has been an increase of over 30% in the number of dogs being diagnosed with diabetes.

Fortunately diabetes is a very treatable condition and diabetic dogs can still live happy, active lives with the right veterinary care.

Causes of Dog Diabetes

Perhaps surprisingly, there really isn’t one firm, universally accepted theory as to why some dogs become diabetic.

The physical cause of Diabetes Mellitus in dogs is an ineffective pancreas resulting in reduced insulin levels, or an incorrect physiological response by your dog’s body to normal insulin levels

Dog diabetes may be caused by:

  • Inflammation of the Pancreas (acute or chronic Pancreatitis)
  • Auto-immune disease (one trigger MAY be over-vaccination)
  • Genetic predisposition
  • Cushing’s Disease

Other possible causes of canine diabetes may include:

  • A high fat diet
  • Obesity (often as a result of high fat diet)
  • Medications (such as corticosteroids)
  • Pregnancy

Symptoms of Diabetes in Dogs

Symptoms of canine diabetes are pretty diverse because high levels of blood sugar over time can cause damage to many organs and bodily functions.

The most common signs that your dog may be developing diabetes include:

  • Increase in thirst and excessive drinking
  • Increase in urination (with possible housebreaking accidents)
  • Excessive hunger
  • Weight loss
  • Lethargy or excessive sleepiness
  • Dry, dull coat
  • Cloudy eyes or poor vision
  • Repeated urinary tract infections
  • Vomiting
  • Sweet, sugary smell to the breath

Obviously some of these symptoms can point to other diseases or illnesses, so if you notice any of them in your dog it’s important to have a full veterinary exam so you can get a correct diagnosis.

Treating Canine Diabetes

How your vet chooses to treat your older dog if he develops diabetes depends on how advanced/severe his illness is at the time of diagnosis.

senior golden retriever with veterinarian

Your vet will most likely run tests on your dog’s blood and urine to check glucose levels.

Other lab work such as tests for liver function and enzymes, as well as electrolyte levels may also be used to figure out what stage your dog is at and how much damage has been done (or not done).

For early-to-mid stage canine diabetes some simple changes in diet and exercise levels may be the first step.

A dog food with a low glycemic index (which contains ingredients that convert to sugar slowly and therefore maintain a better glucose balance) can help.

So can consistent, moderate exercise which may help prevent erratic blood sugar spikes/drops.

If your dog is overweight, it’s a good idea for her/him to slim down under your vet’s supervision. This will make the body better able to maintain healthy glucose levels.

Some dogs with mild/moderate diabetic symptoms will also need daily insulin shots, for the rest of their lives.

Dogs whose diabetes has become severe may need specialized, in-house care in order to stabilize their health. Once ready to return home they will also be likely to need daily insulin therapy.

Giving your dog a daily shot might sound awful, but I’m told that it isn’t too difficult and quickly becomes just a part of your daily dog-care routine.

In some cases oral medications can be prescribed in place of the shots, the decision on which treatment option is best for any dog with diabetes rests with the veterinarian.

Treatment for canine diabetes also includes keeping a close eye on blood sugar levels, so you’ll be doing regular glucose testing (which can be done at home). Periodic blood tests will also be done by your veterinarian.

Your vet will be able to tell you how to monitor your golden oldie successfully, the signs that could mean trouble, and how to handle any issues.

Due to the effect hormones can have on glucose levels, your vet may suggest that an un-spayed female be spayed as soon as her health is stable as part of her treatment program.

Diabetes in dogs is a chronic condition, and requires on-going treatment and monitoring for life, as well as a regular exercise routine and regular mealtimes.

Luckily with the right care your diabetic dog’s life can continue to be happy, comfortable and enjoyable.

Preventing Diabetes in Dogs

There is no way to guarantee that your dog won’t develop canine diabetes in later life.

Genetics can be an invisible trigger, and there are still some unknowns and uncertainties surrounding the disease

But the good news is that there are some simple things you can do that will help minimize the risks for your dog, these include:

Prevent obesity

Feeding a premium dog food, portion control, and regular mealtimes are all part of maintaining a healthy weight for your senior dog.

A low fat, high fiber diet is what you should be aiming for. Check out this page for more help with choosing the best food for dogs with health problems, including Diabetes.

Although a few treats aren’t going to pack on the pounds, it’s important to monitor how many treats and goodies your dog gets… and even more important to make sure that they are suitable for diabetic dogs.

Choosing diabetic dog treats isn’t a challenge when you know what your options are!

Have a regular exercise routine

Getting a moderate amount of exercise on a daily basis is good for dogs of all ages and can help prevent many canine health problems including diabetes.

Combined with an appropriate and healthy diet, exercise will also help to keep your dog at the correct weight.

Daily walks, back-yard play-times, even training sessions can all play a role in increasing your senior dogs activity level.

Check out this page to learn more about exercising older dogs safely and effectively.

Spay your dog

Statistics show that spayed female dogs are less likely to develop Diabetes than un-spayed females.

Avoid long-term steroid use if possible

Research indicates that long-term use of steroid drugs can cause auto-immune problems or other side effects which may lead to the development of diabetes.

Some health conditions require the use of steroid medications, and in that situation obviously be guided by your veterinarian’s advice.

But, limit the length of time your dog has to use these as much as possible.

About Dr. Winnie 84 Articles
My name is Dr. Winnie. I earned a Bachelor of Science in Psychology from Duke University, a Masters of Science in Biology from St Georges University, and graduated from the University of Pretoria Veterinary School in South Africa. I have been an animal lover and owners all my life having owned a Rottweiler named Duke, a Pekingese named Athena and now a Bull Mastiff named George, also known as big G! I'm also an amateur equestrian and love working with horses. I'm a full-time Veterinarian in South Africa specializing in internal medicine for large breed dogs. I enjoy spending time with my husband, 2 kids and Big G in my free time. Author and Contribturor at SeniorTailWaggers, A Love of Rottweilers, DogsCatsPets and TheDogsBone


  1. my dog just diagnosed as having diabetes , and just started on insulin 3 units a day now on twice a day units 6 total , has developed loss of balance , staggering since yesterday , is this a normal side effect of the treatment his treatment began 5 days ago he is an older dog Yorkshire terrier so not big

    • My dog has been diagnosed in the last week and she was also staggering, losing balance after a couple of days. Turns out it was actually too much insuline, so she’s now off it for the weekend until her glucose levels pick up again. Also found out today that she has pancreatitis so I’ll be picking up medication for that tomorrow. Just hope she picks up a bit, she looks so fed up and just sleeps all the time. She is an old dog now and I’m questioning how long she can put up with this until I need to make the big decision.

  2. I’m after a natural medication for my 14 year old who has terrible anxiety. Our vet put him on Kalma 2 Nh a day half in the morning and half at night. We feel he has a side affect with this drug. He is seeing a lot more has become quite strange with his behaviour walking around not knowing where he is hunger all the tile jumping up at the kitchen bench things he never did before. He also so has pancreatics and a skin condition. I’m really worried about him he has become weird. I would love some help on what to do. I’ve been given him the kalma medication because I thought it might take a couple of weeks to work but I don’t want him to have it but he does need something

  3. My min pin has advanced stages of diabetes which came on quickly since decmber and now is very thin but eating twice a day, walking around, barking, and acts fairly normal except for weight loss, milky eyes and a bit wobbly.
    His tail wags a lot when he is pampered or talked to.

    The vet wants to put him down and i walked out of his office.
    I know my little fellow well, he is always hungry and thirsty but why, why why end his life.
    Could this happy however skinny fellow be suffering so much?

    Please help!

    • Hi Melody,

      I to, have a diabetic Min Pin. You will have to keep taking him to some vet to keep him alive. He will need to be glucose tested to find, & keep him on the correct insulin amount. You should be able, to give him a diet with moderate fat to halt the weight loss, & increase weight gain, as long as he is also, getting the correct, tested amount of required insulin.

  4. Our dog is a 8 yr old boxer. He likes to eat his food fast and drinks a lot water through out the day. We have had him on a different kind of food for him to loose weight. I think that has helped.But he also has a belly that hangs down some. We plan on taking him to the vet next week. Any one have any clues? Hopefully nothing serious is going on. Diabetes?

  5. Hi Nancy, I know I’m joining the discussion late but my Min Pin is also diabetic! The vet was very detailed about 2cc shots after both mealtimes every day, which sucks for the little guy, but he is still very playful, happy, alert and snuggly despite the daily “needle torture”. How old was yours when diagnosed? Mine is 9. I’m worried about how skinny he is, which hasn’t improved in the 6 weeks he’s been on insulin- did you experience this? Also, you mentioned glucose testing, I have wondered about that but the vet never mentioned it at all. Can it be tested without another needle poke? 🙁 thanks so much. I hope your min pin is doing well! 🙂

  6. Hello…
    I am now in the second year of my 12 year old Cairn Terrier’s diabetes and Cushings Disease. After the initial weeks of getting everything in balance with the insulin, Cushings medication, and diet, we have a fairly good routine. Our vet recommended four smaller meals per day, which seems to work, and we too administer insulin with the morning and evening meals. The worst part of all this, really, is the simple fact that it ties a person down. I am retired, but doubt I could handle this routine if I worked full time. And as I am the only one in my house who can give the injections, it is even more demanding for me….hard to go out at night, impossible to go away overnight.

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