Exocrine pancreatic insufficiency in cats
The pancreas produces enzymes that allow food to be digested. In exocrine pancreatic insufficiency, it does not produce enough of them: food passes through the intestine without being properly digested or absorbed. In cats, this most often...
What is it?
The pancreas produces enzymes that allow food to be digested. In exocrine pancreatic insufficiency, it does not produce enough of them: food passes through the intestine without being properly digested or absorbed.
In cats, this most often follows chronic pancreatitis that has gradually destroyed the enzyme-producing cells.
The typical sign is a cat that loses weight while eating normally, or even eating more, with abundant, pale, fatty stools.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Progressive weight loss despite normal or increased appetite.
Very abundant, loose, pale stools with a fatty appearance, often foul-smelling.
Greasy or matted fur around the anus and under the tail.
Dull, poorly groomed coat.
Vomiting, increased thirst, or conversely, loss of appetite in some cats.
In some cats, stools appear almost normal: it is then the weight loss that raises concern.
Duration matters: signs lasting more than three weeks point toward this chronic disease rather than temporary diarrhea.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
Chronic pancreatitis, by far the most common cause in cats.
More rarely, pancreatic tumor or other pancreatic disease.
The lack of enzymes often leads to poor absorption of vitamin B12, which worsens digestive problems and weight loss.
History of chronic pancreatitis.
Diabetes mellitus, which can coexist with pancreatic insufficiency.
The age of onset varies: sources describe the disease mainly in middle-aged to older cats, but also at any age.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Diagnosis is based on a specific blood test that measures a substance produced by the pancreas; a markedly low level confirms the disease.
Vitamin B12 and folate levels are part of the workup, as deficiency of these is common.
Your vet rules out other causes of weight loss with maintained appetite: hyperthyroidism, diabetes, inflammatory bowel disease, and digestive lymphoma.
An abdominal ultrasound may be recommended to examine the pancreas and intestine.
How long signs have been present and the pattern of weight change are valuable information: note these before your appointment.
Treatment
Treatment relies on providing the missing pancreatic enzymes, mixed into each meal. This must be continued for life.
A vitamin B12 supplement is needed in most cases, at least initially, based on blood test results.
The vet will recommend a highly digestible diet.
Associated conditions such as diabetes or inflammatory bowel disease are treated alongside the main condition.
Enzyme dosages and supplement frequency are set and adjusted only by your vet, based on your cat's weight and stool quality.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
There is no specific prevention.
Managing and treating chronic pancreatitis allows early detection of progression to pancreatic insufficiency.
Weigh your cat regularly: gradual weight loss can easily go unnoticed.
Possible complications
Severe weight loss and muscle wasting.
Vitamin B12 deficiency, with persistent digestive upset.
Imbalances related to poor absorption of certain vitamins.
Associated diabetes, when pancreatitis has also affected the insulin-producing cells.
When to see a veterinarian
Your cat is losing weight rapidly despite eating well: schedule an appointment within the week.
Its stools are very loose, pale, or fatty for several weeks.
Hair around the anus appears greasy or matted.
Your cat has previously had pancreatitis or is diabetic and is losing weight.
It has not eaten for twenty-four to forty-eight hours: seek care without delay.
Prognosis
With lifelong treatment, most cats regain weight and return to normal stools within a few weeks.
Outcome depends mainly on associated conditions, particularly diabetes or inflammatory bowel disease.
Frequently asked questions
My cat is eating a lot but losing weight: pancreatic insufficiency or hyperthyroidism?
Both give this association. Hyperthyroidism is rather accompanied by increased thirst and urination, and agitation in an elderly cat. Very abundant, pale and fatty stools point toward pancreatic insufficiency. A blood test makes it possible to tell the difference.
Is the treatment lifelong?
Yes. The pancreas does not regain its ability to produce enzymes: they must be supplied with each meal, on a permanent basis.
Why take a vitamin B12 supplement?
Because its absorption depends partly on the pancreas. Deficiency is common and perpetuates digestive disorders: correcting it is part of the treatment.
Is it related to his pancreatitis from a few years ago?
It is possible. In cats, pancreatic insufficiency most often results from chronic pancreatitis that has gradually destroyed the digestive portion of the pancreas.
References
Content reviewed by the TunisieVet editorial team · Updated 10 October 2026
Comments (0)
No comments yet.
AT A GLANCE
Need a veterinarian?
Find a practitioner near you on TunisieVet, with their specialities, hours and contact details.
Find a veterinarianAffected species
This information is provided for educational purposes only and is not a substitute for a veterinary consultation. If you have any concerns about your animal's health, consult a veterinarian.
Thinking of welcoming a pet? Dogs and cats are waiting for a family in Tunisia, and adoption is completely free.
Adoption listingsOn the TunisieVet marketplace
Food, hygiene and accessories for cat, sold by verified shops and delivered across Tunisia.
Buying advice, not medical advice: for a diagnosis or treatment, consult your veterinarian.
To discover
Related diseases and linked Animalia content.
Rabies
Viral · Vaccine available
Hip dysplasia
Other
Otitis externa
Environmental
Periodontal disease
Other
