EPI Dog Diet: What to Feed a Dog With Exocrine Pancreatic Insufficiency

A dog with exocrine pancreatic insufficiency (EPI) does best on a highly digestible, low-fiber, moderate-fat diet, fed with pancreatic enzymes at every meal. The exact recipe is individual, and your veterinarian fine-tunes it based on your dog’s weight, stools and bloodwork. If your dog was just diagnosed, take a breath: with the right enzymes and a food that suits their gut, most dogs with EPI gain weight back and feel like themselves again.

This guide explains what the research says about fat, fiber, protein and food type, how enzymes fit in, what to watch for, and how to judge whether a food is working.

TL;DR

• Most dogs with EPI need lifelong pancreatic enzymes with each meal, and diet works alongside them, not instead of them.
• Aim for highly digestible, low-residue food with moderate fat. Very low-fat and high-fiber diets can backfire.
• Track body weight and stool quality weekly, and ask your vet about vitamin B12 (cobalamin).
• Responses to diets vary from dog to dog, so change one thing at a time and keep your vet in the loop.
• Treat any food, ours included, as one piece of a plan your veterinarian signs off on.

Table of Contents

• What EPI does to digestion
• The core of an EPI dog diet
• Enzymes come first, diet second
• Commercial, fresh, raw or homemade: what works?
• The calorie trap
• How to tell whether the diet is working
• Our perspective on feeding a dog with EPI
• Questions to bring to your vet
• Where Loyal Saints fits
• FAQ
• Sources

What EPI does to digestion

The pancreas makes the enzymes that break down fat, protein and starch. In EPI, it no longer makes enough of them, so food passes through largely undigested. The dog can eat well and still lose weight, with greasy or loose stools and a constant hunger that can be heartbreaking to watch.

Fat is the nutrient most affected. The VCA animal hospitals guidance on pancreatic disease notes that protein and carbohydrates also need pancreatic secretions but are usually less affected than fat, which is why fat gets so much attention in EPI diets.

That matters for the way you shop. The goal is not to find a special “EPI food.” The same VCA page says there are no specific diets for dogs with EPI, and suggests a starting point of low fiber, moderate protein and moderate fat, adjusted by your veterinarian as your dog responds.

The core of an EPI dog diet

A 2024 review in the Journal of the American Veterinary Medical Association says dogs with EPI should generally eat a low-residue diet with moderate fat, together with pancreatic enzyme replacement therapy. Highly digestible, low-residue foods are preferred because they deliver more usable energy per bite, which helps your dog keep or regain body condition.

In plain terms, you are looking for:

1. High digestibility. Whole, named protein and simple, easily absorbed ingredients.
2. Moderate fat. Enough to keep calories up and food tasty, not so much that it overwhelms a dog who is still digesting imperfectly.
3. Low fiber. Fiber can get in the way of enzymes and absorption.
4. Enough calories. Underfeeding is a quiet problem in EPI, covered below.

Fat: low, moderate or high?

This is the question that splits online forums, and it is why you will see conflicting advice from one dog owner to the next.

The JAVMA review explains that low-fat diets are generally avoided because they can lead to poor energy density and malnutrition. A moderate-fat diet is often recommended to maintain calorie intake, though your vet may adjust the level based on how your dog responds.

The University of Guelph’s Pet Nutrition service describes a range for dogs of 15 to 30% protein, 10 to 15% fat and under 5% crude fiber on a dry matter basis. The same page is candid that finding the right fat level is a trial-and-error process: fat makes food palatable and calorie-dense, but it has to be balanced against what your dog can digest.

Dry matter numbers are not the same as the percentages on a bag label. Labels list “as fed” values, which include moisture, so ask your vet or a veterinary nutritionist to convert them for the food you are considering.

Fiber: keep it low

The same review says high-fiber diets are avoided because they can interfere with nutrient absorption and enzyme activity. That is a reason to look closely at ingredient lists full of beans, peas, bran, beet pulp and other bulky plant material. A small amount of vegetables or fruit is not automatically a problem, but the total fiber in the food and treats matters. If you want to understand the mechanism, our post on how fiber affects nutrient absorption in dogs walks through it.

Protein and carbohydrates

Most dogs with EPI can handle a moderate amount of protein from a digestible source. Carbohydrates are generally less of a concern than fat, according to VCA, though the starch source and quantity still affect stool quality. If your dog has a history of food sensitivities, keep the protein they tolerate and avoid swapping it casually.

Enzymes come first, diet second

No food, however good, replaces the enzymes your dog’s pancreas stopped making. The JAVMA review states that the vast majority of dogs with EPI need lifelong pancreatic enzyme replacement therapy (PERT), given at each meal.

A few practical points:

• Enzymes work when they are mixed with food, so they go in the bowl at every meal, not on a separate schedule.
• Treatment commonly includes cobalamin (vitamin B12) supplementation, since many dogs with EPI run low.
• If signs persist despite treatment, your veterinarian may look at the enzyme dose or formulation, the diet, a concurrent intestinal disease or an imbalance of gut bacteria. In some nonresponders, an acid-suppressant medication can be tried.
• The Merck Veterinary Manual notes that the lowest effective dose can vary between enzyme batches, so a dose that worked on one bottle may need rechecking on the next.

The same manual describes fresh raw pancreas as a viable alternative to powdered extract, with 30 to 90 g (1 to 3 ounces) typically replacing 1 teaspoon of extract. It also warns that raw products can be contaminated, so this is a conversation for your vet, not a kitchen experiment.

Commercial, fresh, raw or homemade: what works?

According to the Merck Veterinary Manual’s section on malabsorption in small animals, a good-quality commercial diet is adequate for many dogs with EPI, and highly digestible, low-residue diets are often used.

Here is how the main options compare in practice:

A 2006 study in JAVMA found that responses to different diets vary unpredictably among individual dogs, which supports the idea that feeding plans should be individualized. That is also why the confident “EPI dogs must eat X” claims you see on forums should be taken lightly. What worked for someone else’s dog is a lead to discuss with your vet, not a prescription.

The calorie trap

One of the most common reasons an EPI dog seems not to be responding is that the food is simply too low in calories. Today’s Veterinary Practice points out that choosing a diet that is too low in calories is among the most frequent causes of perceived treatment failure.

That often happens when owners respond to loose stools by cutting fat sharply. The stools may firm up a little, but a dog who is already malabsorbing now gets even fewer calories. If your dog is thin and ravenous, ask your vet about calorie targets rather than assuming more fat is the culprit. When you compare foods, look for an energy-dense, digestible formula and measure by calories per cup or per ounce, not just the weight of the scoop. For a broader look at choosing a digestible, calorie-dense diet and avoiding malnutrition, this guide to dog food options is another place to browse.

How to tell whether the diet is working

You do not need a lab to start. The JAVMA review says owners can monitor body weight and stool quality, and those two signals tell you most of what you need between vet visits.

1. Weigh weekly. Use the same scale at the same time of day. A slow upward trend in a thin dog is a good sign.
2. Score the stool. Note firmness, color, volume and any greasy sheen. Take a photo for your vet if it helps.
3. Watch appetite and energy. Constant scavenging often eases as nutrients are absorbed.
4. Change one variable at a time. New food, new enzyme batch and new treats all at once make it impossible to know what helped.
5. Give a new food time. Transition gradually over about a week or more, as your vet advises, and judge it over several weeks rather than a few days.

Call your veterinarian if weight keeps falling, stools stay loose or greasy, or your dog stops eating. As the Merck Veterinary Manual describes, owners and vets should also keep an eye out for vitamin deficiencies, especially cobalamin, along with weight loss and possible concurrent small intestinal disease.

Our perspective on feeding a dog with EPI

We founded Loyal Saints because we believe dogs are family, and we know how stressful it is when a family member can’t hold weight. So here is our honest take.

First, EPI is a medical condition. We make freeze-dried raw dog food, and we would never tell you a food can replace enzyme therapy or your veterinarian’s plan. Our foods are formulated to meet AAFCO standards, made with human-grade whole ingredients and no fillers or synthetic additives, but EPI dogs have narrow needs, and we are not claiming our recipes treat the condition.

Second, simple is often kind to a sensitive gut. A short ingredient list, a single named protein and no bulky filler make it easier to see what your dog tolerates. That is the same logic behind the limited-ingredient approach many owners use when sorting out digestive problems.

Third, check the numbers, not the marketing. Whatever you feed, ask for the fat, fiber and calorie content, then compare those against the targets your vet gives you. If a fat or fiber figure is not available for a food, that tells you something too. You can reach out to us with questions about a specific recipe, and we would rather help you rule a food out than have you guess.

Finally, we know pancreatic conditions overlap in confusing ways. If your dog has had pancreatitis as well, our pancreatitis diet guide explains how fat limits are handled there, which can differ from what EPI calls for. Your vet decides which applies to your dog.

— Kristina

Questions to bring to your vet

A short list makes appointments more productive:

• What body weight and calorie target should we aim for?
• What fat and fiber range, on a dry matter basis, fits my dog?
• Which enzyme product and dose are we starting with, and how do we recheck it?
• Does my dog need B12 injections or oral supplements, and when should we retest?
• Are treats, chews and supplements fine, or should I pause them?
• When should we consider a veterinary nutritionist for a balanced home-cooked or alternative plan?

Bring a list of everything your dog eats, including chews and table scraps. Small extras can have a big effect on a sensitive gut.

Where Loyal Saints fits

If your vet is comfortable with a freeze-dried raw food as part of your dog’s plan, our recipes are shelf-stable, so there is no thawing, fridge space or ice packs. They come in Beef, Chicken, and Turkey + Salmon, priced from $24.95 to $44.95 depending on size. You can start with a small bag to see how your dog does before committing to a larger one: here is the Beef 5 oz bag, or browse all recipes on our home page.

If you go on to feed us regularly, the Halo Club membership costs $79.99 per year or $10.99 per month, with savings and free shipping perks. Standard shipping is $7.99 and express is $14.99, as listed on our shipping and returns page. Please share the ingredient list and guaranteed analysis with your veterinarian before you switch.

FAQ

What should I feed a dog with EPI?

A highly digestible, low-fiber food with moderate fat, given with pancreatic enzymes at every meal. Your veterinarian may start with a veterinary gastrointestinal diet or a good-quality commercial food and adjust based on weight and stools. Exact fat and fiber targets depend on the individual dog.

Is low-fat or moderate-fat food better for EPI?

Moderate fat is often recommended. Very low-fat diets can leave a dog short on calories and contribute to malnutrition, while too much fat can worsen stools in a dog still digesting poorly. Your vet can adjust the level over time, and it often takes some trial and error.

Can a dog with EPI eat a raw or fresh diet?

Some do, but it needs planning. Raw products can be contaminated, and a diet that is not complete and balanced can cause deficiencies. Talk with your veterinarian or a veterinary nutritionist before moving to raw, fresh or home-cooked food, and keep giving enzymes with each meal.

Do dogs with EPI need enzymes forever?

In the vast majority of cases, yes. Enzyme replacement is typically lifelong and given with every meal. The dose may be adjusted over time, so keep up regular rechecks rather than changing it on your own.

How long until I see results from a diet change?

It varies by dog, but give any new food several weeks and track weight and stools weekly. If there is no improvement or your dog loses weight, call your vet, who may review the enzyme dose, the diet and other possible causes.

Sources

• Exocrine pancreatic insufficiency in dogs and cats, JAVMA 2024
• Nutritional Approaches to Exocrine Pancreas Insufficiency, OVC Pet Nutrition
• Exocrine Pancreatic Insufficiency in Dogs and Cats, Merck Veterinary Manual
• Malabsorption Syndromes in Small Animals, Merck Veterinary Manual
• Effects of diet on clinical signs of exocrine pancreatic insufficiency in dogs, JAVMA 2006
• Canine and Feline Exocrine Pancreatic Insufficiency, Today’s Veterinary Practice
• Nutrition and Pancreatic Disease in Dogs, VCA Animal Hospitals

Recommended

• Pancreatitis Diet for Dogs: Making the Under 20 g Fat Target Practical
• Pancreatitis in Dogs: Diet Guide
• How Digestive Enzymes Improve Nutrient Absorption