EPI in Dogs: Symptoms, Causes, and Treatment

What Is EPI in Dogs?

EPI in dogs (exocrine pancreatic insufficiency) is a digestive disorder that occurs when the pancreas does not produce enough enzymes to properly break down food.

The pancreas is a small organ located beneath the stomach near the beginning of the small intestine (the duodenum). It has two important roles in the body:

• Producing insulin, the hormone that helps move sugar from the bloodstream into cells
• Producing digestive enzymes, including lipase to break down fats, proteases to break down proteins, and amylase to break down starches

Different pancreatic cells perform these functions. When insulin-producing cells are damaged, dogs can develop Type 1 diabetes. When the cells responsible for producing digestive enzymes fail to function properly, the result is EPI in dogs.

Symptoms of EPI in Dogs

Dogs with EPI cannot properly digest and absorb nutrients because the pancreas does not produce enough digestive enzymes.

As a result, affected dogs often experience significant weight loss despite eating normally or even excessively.

Common symptoms include:

• Ravenous appetite
• Eating feces (coprophagia)
• Eating non-food items (pica)
• Soft stool or diarrhea that is pale, greasy, or foul-smelling, caused by undigested food in the intestines
• Excess gas
• Flaky skin and a rough or poor-quality coat

In more severe cases—or when another health condition occurs alongside EPI—additional symptoms may also develop.

Causes of Exocrine Pancreatic Insufficiency in Dogs

The most common cause of EPI in dogs is pancreatic acinar atrophy (PAA), particularly in dogs younger than four years old.

PAA is believed to be an autoimmune disease, meaning a dog’s immune system mistakenly attacks and destroys the pancreatic cells responsible for producing digestive enzymes. Genetics appears to play a major role, which is why EPI occurs more frequently in certain dog breeds.

German Shepherd dogs are most commonly affected, but studies have also found a higher incidence of EPI in the following breeds:

• Rough-Coated Collies

• Chow Chows

• Cavalier King Charles Spaniels

• Cairn Terriers

• Akitas

• West Highland White Terriers

• Cardigan Welsh Corgis

• Border Collies

• Australian Heelers

• Australian Shepherds

• Shetland Sheepdogs

However, EPI can occur in any breed, and not all cases are genetic.

Other conditions that damage or destroy pancreatic tissue can also lead to EPI, including:

• Pancreatic cancer
• Severe or chronic pancreatitis
• Other rare pancreatic disorders

How Veterinarians Diagnose EPI in Dogs

A veterinarian may suspect EPI in dogs based on symptoms, breed predisposition, and medical history, but laboratory testing is required to confirm the diagnosis.

Because several digestive diseases can cause similar symptoms, veterinarians often use a combination of tests to evaluate overall health and specifically assess pancreatic function.

Blood Chemistry Test and Complete Blood Cell Count

Routine blood tests—including a blood chemistry panel and a complete blood count (CBC)—help veterinarians evaluate a dog’s overall health. These tests can also detect conditions sometimes associated with EPI, such as anemia (low red blood cell count).

Trypsin-Like Immunoreactivity (TLI) Test

The trypsin-like immunoreactivity (TLI) test is the most reliable test for diagnosing EPI in dogs.

Trypsin is a digestive enzyme produced by the pancreas and normally circulates in small amounts in the bloodstream. In dogs with EPI, blood trypsin levels are significantly lower than normal.

This test requires a blood sample, and dogs must fast for 8–12 hours before testing to ensure accurate results.

Other diagnostic tests for EPI exist, but they are generally less reliable than the TLI test and are usually used only in specific circumstances.

Vitamin Deficiencies and Folate Testing

Dogs with EPI often develop vitamin deficiencies because they cannot properly absorb nutrients from food.

Vitamin B12 (cobalamin) deficiency is especially common, and folate levels (another B vitamin) may be normal, elevated, or low.

In severe cases, dogs may also develop vitamin K deficiency, which can lead to abnormal bleeding.

Your veterinarian may test these vitamin levels to determine whether supplementation is needed to restore normal health.

Is EPI in Dogs Curable?

No, EPI in dogs is not curable.

Once the pancreas is damaged enough to cause exocrine pancreatic insufficiency, the affected cells cannot recover their ability to produce digestive enzymes. As a result, dogs with EPI usually require lifelong treatment.

Management typically includes pancreatic enzyme supplements, and some dogs may also need additional therapies depending on their symptoms.

With proper treatment and monitoring, however, most dogs with EPI can live healthy, comfortable, and active lives.

Treatment for Exocrine Pancreatic Insufficiency in Dogs

Treatment for EPI in dogs focuses on replacing missing digestive enzymes and correcting nutrient deficiencies.

While the concept is straightforward—providing pancreatic enzymes with meals and addressing vitamin deficiencies—managing EPI can sometimes require adjustments based on how each dog responds to treatment.

Pancreatic Enzyme Supplements

Pancreatic enzyme replacement is the cornerstone of treatment. Enzyme supplements must be added to every meal to help break down nutrients so they can be absorbed.

Powdered enzyme supplements are most commonly recommended because they mix easily with food and tend to be more effective than tablets. Examples include:

• VET One® PancrePlus Powder
• PanaKare™ Plus Powder

Tips for Administering Pancreatic Enzyme Powders

• Mix the enzyme powder thoroughly into your dog’s food before feeding.
• Proper mixing helps prevent irritation to the mouth.
• Some pet parents allow the food to sit briefly to allow partial “predigestion.” While research has not proven this improves outcomes, it may help some dogs.
• Follow dosing instructions from your veterinarian or the product label. Once symptoms are well controlled, your vet may adjust the dose to the lowest effective amount.

Raw Pancreas Meat

Another potential source of digestive enzymes is raw pancreas from other animals.

This organ meat can sometimes be purchased from butchers or raw pet food suppliers. However, feeding raw animal products carries a risk of food-borne illness, such as salmonella, for both pets and people in the household.

A typical starting amount is 1–3 ounces of pancreas meat per meal, but the exact amount should be determined by your veterinarian.

You can grind up and freeze pancreas meat in the appropriate portions and then thaw it before mixing it thoroughly with each meal.

Because pancreatic enzymes can be partially broken down in the stomach, medications that reduce stomach acid, such as omeprazole, may sometimes be prescribed.

Vitamin Supplementation

Dogs with EPI frequently develop vitamin deficiencies because their bodies cannot absorb nutrients properly.

Vitamin B12 (cobalamin) deficiency is particularly common. Treatment typically begins with B12 injections, which are more effective than oral supplements early in treatment. Once your dog stabilizes, your veterinarian may transition them to an oral supplement.

Other vitamins, including folate, may also require supplementation depending on blood test results.

Antibiotics

Some dogs with EPI develop bacterial overgrowth in the small intestine, which can worsen digestive symptoms.

This condition may be treated with antibiotics such as tylosin. Many dogs only need antibiotics temporarily while their digestive function improves, but some may require longer-term treatment.

Your veterinarian may recommend additional therapies depending on your dog’s symptoms and any other underlying health conditions.

Recovery and Management of EPI in Dogs

Most dogs with EPI begin to improve within a few days to several weeks after appropriate treatment is started.

If your dog’s symptoms are not improving, consult your veterinarian. Adjustments to enzyme dosing, vitamin supplementation, antibiotics, or diet may be needed.

In some cases, additional diagnostic testing may be recommended to determine whether another condition is contributing to your dog’s symptoms.

EPI Diets for Dogs

There is no single diet that works for every dog with EPI. Nutritional needs can vary significantly from one dog to another.

Some dogs respond best to highly digestible diets that are relatively low in fat and fiber, while others may do well with diets containing moderate fat or increased fiber. Some dogs can even remain on their regular diet once enzyme therapy is working effectively.

Your veterinarian may recommend trying different diets to see which provides the best results for your dog.

If your dog continues to have poor response to treatment, it may indicate that another medical condition is present. In these cases, further testing may be necessary to identify additional health problems and adjust the treatment plan accordingly.

Is EPI in Dogs Curable?

No, EPI in dogs is not curable.

Once the pancreas is damaged enough to cause exocrine pancreatic insufficiency, the affected cells cannot recover their ability to produce digestive enzymes. As a result, dogs with EPI usually require lifelong treatment.

Management typically includes pancreatic enzyme supplements, and some dogs may also need additional therapies depending on their symptoms.

With proper treatment and monitoring, however, most dogs with EPI can live healthy, comfortable, and active lives.