EPIExocrine Pancreatic Insufficiency is a disease which causes diarrhea and/or weight loss despite normal eating habits due to a lack of digestive enzyme production by the pancreas. While most common in German Shepherds, it can effect other breeds of dogs as well and can also be found in cats.

That's the bad news.

The good news is that it's treatable and your pet can live a long healthy life.

Lack Of Digestive Enzymes in Dogs

Exocrine Pancreatic Insufficiency (EPI) in Dogs

by PetMD

The pancreas is the organ in the body responsible for producing insulin (which regulates the body’s blood sugar levels) and digestive enzymes (which aid in the digestion of starches, fats, and proteins in an animal’s diet). If the pancreas fails to produce enough of these digestive enzymes, exocrine pancreatic insufficiency, or EPI, develops.

EPI may affect a dog's gastrointestinal system, as well as general nutrition, and can cause problems such as weight loss and chronic diarrhea. The condition is thought to be hereditary in German Shepherds.

The condition or disease described in this medical article can affect both dogs and cats. If you would like to learn more about how this disease affects cats, please visit this page in the PetMD health library.

Symptoms and Types

EPI may cause digestive problems, malnutrition, and/or improper absorption of nutrients into the body, which can contribute to an overgrowth of bacteria in the intestines. Symptoms may include chronic diarrhea; weight loss despite a normal or increased appetite; frequent or greater volume of stool and gas; and coprophagia, a condition which causes an animal to eat its own stool.

Causes

The most common cause of EPI in dogs is idiopathic pancreatic acinar atrophy (PAA). The enzymes responsible for aiding the digestion of starches, fats, and proteins, are produced by cells in the pancreas known as pancreatic acinar cells. PAA develops when these cells fail to function properly, thereby leading to EPI.

The second most common cause of EPI in dogs is chronic inflammation of the pancreas (pancreatitis). If chronic pancreatitis is the cause, it is possible your dog has diabetes, which will also need to be treated.

Diagnosis

If symptoms of exocrine pancreatic insufficiency are apparent, a number of pancreatic function tests can be done. A serum sample that measures the amount of the chemical trypsinogen (TLI) released into the blood from the pancreas should reveal problems in the pancreas. A dog with EPI will have reduced amounts of TLI.

A number of other tests may be conducted, including urine and stool analyses. Gastrointestinal infections or inflammations may be among the other problems responsible for symptoms similar to those of EPI.

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If you suspect your dog is suffering from EPI it's important to discuss it with your vet and run the necessary tests to determine if it is indeed the problem. Fortunately it can be treated with enzyme replacement additive to each meal providing your dog with a normal healthy life..

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