Diabetic Dog With Pancreatitis: Feeding for Both

By Theresa Gibilisco, owner, The Hungry Puppy

Diabetes and pancreatitis show up together more often than most people expect, and when they do, the food question gets narrower. People ask us at the counter what's left to feed a dog who needs steady meals for the insulin and a lean diet for the pancreas. The good news is that the two goals usually point the same direction. The tricky part is the details, especially fat.

Here's what the veterinary sources say about feeding a dog with both. This is general information. Your vet has the final word, and with pancreatitis in the picture, that matters even more.

How are pancreatitis and diabetes connected in dogs?

They're closely linked, and the link can run both ways. A 2022 review in the Journal of Veterinary Internal Medicine notes many studies have found pancreatitis alongside diabetes in dogs, and many vets suspect it mostly runs from pancreatitis to diabetes. Pancreatitis is inflammation of the pancreas. AAHA (the American Animal Hospital Association) explains that the digestive enzymes switch on inside the organ instead of in the intestine, so the pancreas essentially starts digesting itself. It can be acute (sudden, sometimes severe) or chronic (slow, repeated inflammation).

• Pancreatitis can cause diabetes. The Merck Veterinary Manual says severe or chronic relapsing pancreatitis can destroy the cells that make insulin, and Merck adds that chronic pancreatitis can lead to diabetes.
• Diabetes is a risk factor too. Articles in Today's Veterinary Practice, by a veterinary internist and by Texas A&M pancreas researchers, list diabetes, along with Cushing's disease and low thyroid, among the risk factors for pancreatitis in dogs.
• A flare-up can throw off blood sugar. The AAHA diabetes guidelines say pancreatitis can destabilize diabetes control and insulin needs may change. When the pancreatitis settles down, insulin resistance (the body responding poorly to insulin) may settle too, so blood sugar can drop too low.

That last point is why your vet may want extra glucose checks after a bout. Never change the insulin yourself. Guidelines ask vets to give owners written material to refer to, so ask for your plan.

How low in fat should the food be?

Low, and your vet sets the exact target. Fat takes more work from the pancreas to digest and slows how fast the stomach empties, according to VCA Animal Hospitals' nutrition team. They say a veterinary therapeutic diet designed to be low fat is usually the best first choice for dogs with pancreatitis.

The numbers sources use don't quite agree:

• Merck: less than 20 grams of fat per 1,000 calories, which it calls crucial for treatment success in dogs.
• Other veterinary sources in Today's Veterinary Practice: under 30 grams per 1,000 calories is the cutoff used by a veterinary nutritionist and a veterinary internist.
• "Ultra-low fat": VCA says vets may recommend an ultra-low-fat diet for a diabetic dog with a history of pancreatitis, and Texas A&M pancreas researchers favor ultra-low-fat feeding too. None of our sources put a number on it.

Lower isn't always better, though. A board-certified veterinary nutritionist writing in Today's Veterinary Practice says fat-free diets aren't appropriate, and that how much fat a dog tolerates is likely individual.

What does "grams of fat per 1,000 calories" mean?

It's how much fat your dog gets for every 1,000 calories of food, no matter how big or small the portion. Vets use it because the fat percentage on the bag can fool you.

• The bag percentage depends on the food's calories. The IVIS veterinary nutrition encyclopedia gives an example: a food that's 10% fat at 4,000 calories per kilogram works out to 25 grams per 1,000 calories, while one that's only 8% fat at 2,700 calories per kilogram works out to 30. The "lower fat" bag actually delivers more fat per calorie.
• Crude fat is a minimum. Two veterinary nutritionists in Today's Veterinary Practice note the fat on the label is a minimum and is often exceeded.
• Words on the label vary. "Lean" and "low fat" have legal maximums. "Light," "lite" and "low calorie" have no fat limit, per the same article.

The easiest route is to ask your vet, or the food company, for the fat per 1,000 calories. We're happy to help you look.

Does fiber still matter for a diabetic dog with pancreatitis?

It can, but the pancreas comes into it. For diabetes, AAHA says more fiber can help blunt the rise in blood sugar after meals, and VCA says diabetic diets are usually low in fat and high in fiber. For pancreatitis, AAHA recommends a low-fat, easily digestible diet, and the toppers VCA suggests are low fat and low fiber. None of our sources gives a fiber target for pancreatitis. Which way to lean depends on your dog, so let your vet choose the food.

Should a dog with pancreatitis be fasted or fed?

That's your vet's call, and thinking has changed. Older advice was to withhold food to rest the pancreas. Merck suggests withholding food only if the dog vomits uncontrollably, and newer veterinary articles encourage introducing food early during treatment. Some owner handouts still say to hold food until vomiting stops.

For a diabetic dog, food and insulin are tied together, so don't decide this at home. If your dog is vomiting, won't eat or seems painful, call your vet for instructions. Don't force food by syringe unless your vet tells you to. Veterinary articles in Today's Veterinary Practice say it risks food aversion and inhaling food.

What treats and toppers are OK?

Low-fat ones, counted. VCA says treats and toppers together should be no more than 10% of daily calories for dogs with pancreatic disease. Low-fat, low-fiber toppers VCA suggests for a picky eater:

• cottage cheese
• cooked skinless chicken breast
• a veterinary low-fat canned food

Skip high-fat treats, and for a diabetic dog VCA also warns against sugary people foods like honey, fruits and syrups. Pick one or two treats and give them the same way each day. More in treats for diabetic dogs, and you can browse our dog treats with your vet's fat limit in hand.

Why are holiday scraps so risky?

Because one fatty bite can be enough. AAHA says a single fatty indulgence can trigger an episode, especially in pets with a history of pancreatitis, and it singles out rich holiday meals and pets stealing fatty scraps. The AVMA says gravy, dressing and poultry skin or fat are hard for pets to digest, and that sometimes even a small amount can cause pancreatitis. Merck calls getting into food a dog shouldn't have a common risk factor, and the 2022 research review linked trash access and table scraps to higher risk.

Keep the trash closed, ask guests not to share, and see diabetic dogs and the holidays before Thanksgiving.

How should I switch foods?

Slowly, over 7 to 10 days, VCA says. Avoid abrupt diet changes, which Today's Veterinary Practice lists among things to avoid for these dogs. A nutritionist writing there adds that a dog moving off a low-fat diet after a bout should do it only once appetite is good and the dog is stable, and that the change should stop for a recheck if lethargy, poor appetite or belly pain shows up. With diabetes, tell your vet before the switch starts. Our step-by-step is in how to switch a diabetic dog to a new food safely.

When should I call the vet?

• Call right away: poor appetite, tiredness, belly pain, or vomiting, which are among the pancreatitis signs AAHA lists. The 2026 AAHA dog guidelines also say to contact your vet if your dog doesn't eat at least half of two meals in a row.
• Go now: VCA says reduced appetite with vomiting or diarrhea can signal diabetic ketoacidosis (a dangerous acid buildup in the blood) that needs hospital care. AAHA lists weakness, wobbling, tremors, collapse and seizures as signs of low blood sugar. Either one means go to the vet now.

Where to go from here

For the basics of the diagnosis, read what it means when the vet says your dog has pancreatitis. High blood fats are a pancreatitis risk in dogs, covered in what it means when the vet says your dog has high triglycerides. If kidney disease is also part of the picture, see senior dog with diabetes and kidney disease.

Prescription diets need your vet's authorization, and we're happy to reach out to your vet for you through our prescription diets service. Our own trucks deliver free on each town's route day, Tuesday through Friday, with a $20 minimum. Find your day on our local delivery page, or call 732-938-4470. For a sit-down conversation about your pet's food, book a free 45-minute Personal Pet Consultant appointment.

Sources

• New insights into the etiology, risk factors, and pathogenesis of pancreatitis in dogs: Potential impacts on clinical practice. Cridge H, Lim SY, Algül H, Steiner JM. Journal of Veterinary Internal Medicine, 2022 (doi:10.1111/jvim.16437).
• 2018 AAHA Diabetes Management Guidelines for Dogs and Cats (2022 update). Behrend E, et al. Journal of the American Animal Hospital Association, 2018 (doi:10.5326/JAAHA-MS-6822).
• 2026 AAHA Diabetes Management Guidelines for Dogs, Section 6: Dietary Management in Diabetic Dogs. American Animal Hospital Association, 2026.
• 2026 AAHA Diabetes Management Guidelines for Dogs, Section 8: Client Education. American Animal Hospital Association, 2026.
• Pancreatitis in Dogs and Cats. Steiner JM. Merck Veterinary Manual, 2025.
• Diabetes Mellitus in Dogs and Cats. Merck Veterinary Manual, updated 2026.
• Top Questions About Pancreatitis in Dogs. Cridge H. Today's Veterinary Practice, 2025.
• Treatment of Acute Pancreatitis in Dogs. Walton SA. Today's Veterinary Practice, 2020.
• To Feed or Not to Feed? Controversies in the Nutritional Management of Pancreatitis. Shmalberg J. Today's Veterinary Practice, 2016.
• A Case of Canine Acute Pancreatitis. Chang C, Steiner JM. Today's Veterinary Practice, 2016.
• Nutritional Management of Hyperlipidemia. Weeth LP, Morgan SK. Today's Veterinary Practice, 2022.
• Treatment of Hyperlipidemia. Schenck PA. Encyclopedia of Canine Clinical Nutrition, IVIS, 2008.
• Understanding Pancreatitis in Pets. American Animal Hospital Association.
• Thanksgiving Pet Safety. American Veterinary Medical Association.
• Nutrition and Pancreatic Disease in Dogs. VCA Animal Hospitals.
• Diabetes Mellitus: Principles of Treatment in Dogs. VCA Animal Hospitals.
• Pancreatitis in Dogs. Animal Medical Center (New York).