How Do Dogs Get Diabetes?

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May 20, 2022 / Dog Health / By: Melanie Evans

Veterinarian puts medication injection into withers of sick dog

As is often the case in humans, diabetes in dogs is something that many people don't understand very well, and the idea of your precious pup being diagnosed with the condition can be very scary.

However, as we will learn here, diabetes, while a serious health condition, can be managed in dogs, allowing them to live an otherwise healthy and happy life.

What is Diabetes in Dogs?

As we mentioned, lots of pet parents have very little idea what diabetes really is, although most do know that it has something to do with blood sugar.

Canine diabetes mellitus, its official name, occurs when the normal process of insulin production in a dog's body. Either too little is produced, or the dog' body stops producing it at all.

Why does this matter to their health? Carbohydrates are metabolized into a variety of simple sugars, including glucose, when your dog eats. Glucose is transported from the intestine into the bloodstream and distributed to all the body's cells.

Insulin is needed to deliver glucose from the bloodstream into the cells, where it can be utilized for energy. When there isn't enough insulin, glucose can't enter cells and instead builds up in the bloodstream to dangerous levels. Hyperglycemia is the medical term for this condition.

As a result, the cells are unable to function properly due to a lack of energy, so they become "starved." This can lead to a range of health complications and even, in some cases, death.

What Causes Diabetes in a Dog?

The cause of diabetes in dogs is a matter of debate.

Some believe it may have a genetic component, while others think that, as is the case in some humans diagnosed with Type 2 diabetes (but not Type 1), being overweight may be a factor. There are some dog breeds more susceptible to weight gain than others.

Diabetes is believed to affect 1 in 30 dogs in the US at some point in their lives, although that figure may be higher, as many vets say often it goes undiagnosed, as screening for it is not usually a part of a standard pet health checkup.

Age seems to be a factor, with most dogs developing diabetes between the ages of 4 and 14. There is some anecdotal evidence - although very little formal research - that suggests that a female over the age of four who has not been spayed is more likely to develop diabetes than her peers.

There are also, as we will go over in more detail soon, some dog breeds that seem to be more prone to developing diabetes than others.

What Are the First Signs of Diabetes in a Dog?

Vets can diagnose diabetes in dogs relatively easily, but they do typically rely on pet parents to alert them to the fact that these tests might be required based on an observation of the various signs and symptoms of early disease.

Of course, to do that, pet parents will need to know what those signs are. While they will vary from pup to pup, the early signs and symptoms of canine diabetes can include all the following:

  • Noticeably more frequent urination
  • Noticeable signs of increased hunger
  • Noticeable increase in water consumption
  • Unusual lethargy
  • Cloudy looking eyes
  • Weight loss

While some of these can also be a symptom of other health conditions, if you notice any of them in your pup a visit to the vet should be scheduled as soon as possible, as early detection of diabetes is a big key in achieving the best possible health outcomes for your pup if they are diagnosed with the condition.

Dog Breeds Prone to Diabetes

While there is very little formal research on the subject, evidence does suggest that some breeds of dog are more susceptible to developing diabetes than others. These breeds are believed to include:

  • German Shepherds
  • Cocker Spaniels
  • Golden Retrievers
  • Labradors
  • Schnauzers
  • Dachshunds
  • Terriers
  • Toy Poodles
  • Samoyeds
  • Doberman Pinschers
  • Pomeranians

Owning one of these pups does mean that they will develop diabetes, the knowledge that their breed is more prone to developing the condition, however, it does mean that pet parents should keep an 'extra eye' out for the signs and symptoms we mentioned earlier.

What Food Causes Diabetes in Dogs?

One of the myths that surrounds diabetes in dogs is that certain kinds of food can cause it directly. There is no credible medical or scientific evidence that this is the case. However, some foods you might be feeding your pup may lead to one of the conditions believed to be a factor in your dog developing diabetes, primarily excessive weight gain.

Any dog food when fed to excess, especially in combination with a lack of exercise, could lead to this, some commercial kibbles contain far more carbohydrates than any dog needs. In fact, as this scientific study explains, once they are weaned dogs do not need carbohydrates at all, but they are often a big part of many commercial dog foods because they are cheaper to include than other forms of nutrition.

What dogs do need, both in general and to help prevent diabetes, is enough protein, and, as we'll cover soon, there are some nutritional 'building blocks' that an increasing body of evidence suggests are also good for helping to prevent diabetes in dogs.

How Do You Prevent Diabetes in Dogs?

There is, medical experts say, typically very little that can be done by a pet parent to prevent their pup from developing diabetes in the first place, especially as its root causes in canines are still very unclear, and a genetic component seems to be a factor, along with age.

Sex may also be a factor, as female dogs, even those who have been spayed, develop diabetes at twice the rate of male dogs.

How to Treat Diabetes In Dogs?

Treatment is the key to helping dogs with diabetes live their best life possible. Once a pup has been diagnosed, which your vet will do through a series of specialist tests.

Although canine diabetes is not entirely curable, it can be effectively managed with the right therapy, food, and exercise.

The goal of diabetes management is to keep blood sugar levels in a healthy range while preventing hypoglycemia (low blood sugar) and its symptoms. Diabetes symptoms such as increased thirst and urination can be reduced or eliminated with proper management.

As is the case for humans, some pups may be started on insulin therapy to manage their diabetes, depending on its severity. This will involve giving your pup measured levels of insulin according to his blood sugar levels, via simple home testing. If they are started on insulin, a vet will instruct you on how to do this, as well as see the pup regularly to conduct more in depth examinations and testing to keep him as healthy as possible.

Diet will also play a big role in managing your pup's diabetes. This does not mean feeding a specific diet, but following the nutritional guidelines given to you by your vet as closely as possible.

Pro Tip

Shop for dog foods foods that rank low on the glycemic index (GI). These foods are vital to a diabetic in order to keep blood sugar levels from spiking.

In very basic terms, a diet that is low in carbs, high in protein and as unvarying as possible is a standard recommendation for dogs with diabetes, but your vet is the best person to talk to about your unique pup's specific dietary needs. These may also change over time, as the condition changes, as it often does as dogs age.

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Can You Reverse Diabetes in Dogs?

Canine diabetes is not completely curable, and the type of diabetes your dog is diagnosed with will affect both his treatment and his progress. Similar to humans, Type 1 diabetes is the result of the pancreas failing to produce enough insulin, and nothing about diet or weight will change that. Should they develop type 2 diabetes, however, which is more common, these things can make a significant positive difference.

As we mentioned earlier, there are some nutritional building blocks that seem to help dogs with either type of diabetes manage it better, including Omega 3 fatty acids, but your vet will advise you about how this might help your pup.

What Should a Diabetic Dog Not Eat?

A diet that is high in carbohydrates, or low in protein, is not going to be beneficial for a dog with diabetes. They should also not be allowed to eat very fattening foods, as this will lead to weight gain they do not need.

Easy Homemade Recipe for Dogs With Diabetes

Some pet parents, distrustful of the ingredients in commercial dog foods, decide to switch their diabetic dog to homemade dog food. It should be noted that this is not a must, especially as doing so involves time and additional expense that some pet parents cannot undertake. Following your vet's recommendations for a good high protein, low-carb dog food and ensuring that they get enough exercise and maintain a healthy weight is far more important.

However, if you do want to try making your own homemade dog food, provided it follows the recommendations given by your vet, doing so can be a great way to offer your pup tasty food he loves without giving him anything bad. If you would like to try a very easy one, here's our suggestion:

Simple Diabetic Dog Stew Recipe

What You'll Need:

  • Ground chicken or turkey (1/2 cup)
  • Brown rice (1 cup)
  • Carrots (1/2 cup, diced)
  • Green beans (1/2 cup, diced)
  • Coconut oil (1/2 tbsp.)- this adds flavor and Omega 3 fatty acids
  • Bone Meal (1 tsp) - this is an excellent way to add extra tasty protein

How It's Done

  • - Cook rice, adding coconut oil and bone meal at the boiling point.
  • - Combine carrots and green beans in a bowl
  • - Brown meat, but do not overcook
  • - Combine all ingredients slowly into the still cooking rice
  • - Stir until rice is cooked, combining all ingredients well.
  • - Serve when cooled, then refrigerate any leftovers.

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Disclaimer: If you are concerned about your pet, visit or call your veterinarian – he/she is your best resource to ensure the health and well-being of your dog. This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian with respect to your pet.

About the author

Melanie Evans is a writer and animal advocate based in Scranton, PA, who, enjoys sharing her lifelong knowledge about dogs. When not working, Melanie enjoys playing a wide variety of sports, traveling and hanging out with her energetic boxer dog Bruce.


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