Diarrhea in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 07.07.2026
Table of contents

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

?

ORANGE for duration >48 h, dehydration, loss of appetite, or Vomiting. RED for blood, tarry stools, collapse, or severe weakness.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition of

Diarrhea in cats is defined as the frequent passage of liquid or unformed stool. It can be an acute or chronic condition triggered by a variety of causes and is often a symptom of an underlying disease.

Can Occur with the Following Diseases:

Grundlagen und mögliche Ursachen

Diarrhea in cats can be caused by a variety of factors. The most common causes include changes in diet, food intolerances or allergies, infections from parasites such as worms or Giardia, bacterial infections, viral infections such as Feline Parvovirus, and inflammatory bowel diseases. Stress can also cause diarrhea in cats, especially if they are sensitive to changes in their environment.

Another common cause of diarrhea in cats is toxic substances or swallowing foreign objects. Cats are curious animals, and sometimes they can ingest things they shouldn’t. This can lead to irritation of the gastrointestinal tract and cause diarrhea. Certain medications, especially antibiotics, can also trigger diarrhea in cats as a side effect.

Basically, diarrhea can also be a symptom of more serious health problems, such as liver disease, kidney disease, or even cancer. Therefore, it is important to determine the cause of the diarrhea in order to take appropriate measures. Chronic diarrhea that lasts longer than two weeks requires a more thorough examination.

Typische Begleitsymptome

  • Increased defecation: A cat with diarrhea will defecate more often than usual. This can happen several times a day or even hourly.

  • Liquid or unformed stool: The stool is often liquid, mushy, or pasty and can vary in color and consistency.

  • Blood or mucus in the stool: In some cases, traces of blood or mucus may be visible in the stool, which may indicate a more serious condition.

  • Vomiting: Diarrhea can often be accompanied by Vomiting, especially if the cause is a gastrointestinal infection.

  • Loss of appetite: A cat with diarrhea may lose its appetite, which can lead to weight loss.

  • Lethargy: Due to fluid loss (dehydration), the cat may appear lethargic or weak.

  • Dehydration: Fluid loss (dehydration) can quickly lead to dehydration, which is recognizable by dry mucous membranes and reduced skin elasticity.

Wann zum Tierarzt?

A veterinarian should be consulted if the diarrhea lasts longer than 24 hours or if it is accompanied by additional symptoms such as vomiting, fever, lethargy, or blood in the stool. These symptoms may indicate a more serious underlying condition that requires medical intervention.

Special caution should also be exercised with young kittens or older cats, as they can dehydrate more quickly and are more sensitive to fluid loss (dehydration). If the cat also has known pre-existing conditions or is taking medication regularly, a visit to the veterinarian is also advisable to avoid interactions or complications.

Symptomerkennung für den Tierhalter und tierärztliches diagnostisches Vorgehen

Symptom recognition for the pet owner begins with observing the cat and documenting the frequency and consistency of the stool. Changes in feeding, behavior, or the environment should also be noted, as they can provide helpful clues for the diagnosis.

The veterinarian will perform a thorough clinical examination and take a detailed medical history. Depending on the suspected diagnosis, further diagnostic tests may be necessary, including blood tests, stool analyses, or imaging procedures such as X-ray or ultrasound. These tests help to identify parasitic infestations, infections, or structural problems in the digestive tract.

In some cases, an endoscopy may be necessary to obtain a direct view of the gastrointestinal tract and to take tissue samples for a biopsy. These measures are particularly important if an inflammatory bowel disease or tumors are suspected.

Was kann der Tierhalter tun und professionelle Therapieoptionen

At home, the pet owner can first try putting the cat on water only for 12 to 24 hours to relieve the digestive tract. During this time, however, the cat should have constant access to fresh water to prevent dehydration.

After the fasting period, a diet of easily digestible food can be started, consisting of cooked chicken (without skin and bones) and rice. This diet should be offered in small, frequent portions. If the cat’s condition improves, it can slowly return to its normal diet.

It is important to observe the cat closely during this time. If there are signs of deterioration, such as continued diarrhea, vomiting, or lethargy, a veterinarian should be consulted immediately. A visit to the veterinarian is also advisable if the diarrhea does not subside within 48 hours after the fasting period.

The pet owner should also ensure that the cat does not have access to potentially toxic substances and that all feed is fresh and suitable for cats. Regular deworming and adherence to the recommended vaccinations can also help prevent diarrhea and other health problems.

Ausblick auf aktuelle Forschung

Current research is intensively investigating how nutrition and the microbiome affect the occurrence and severity of diarrhea in cats. Scientists have begun to examine the role of the intestinal flora / gut microbiota more closely to determine which types of bacteria are associated with healthy digestion and which may be excessively present in diarrhea. These studies could lead to more precise probiotics that are specifically tailored to the needs of cat gut microbiota.

Another interesting area of research is the genetic predisposition for diarrhea in cats. Researchers are analyzing genetic markers that could indicate an increased susceptibility to gastrointestinal problems. The goal is to develop genetic tests that help veterinarians identify at-risk animals early and take preventive measures.

In addition, digital technologies, such as wearable sensors and apps, are increasingly being explored to monitor the health of cats. These technologies could make it easier for pet owners to record changes in their cats’ stool and receive immediate feedback, which in turn could lead to faster diagnosis and treatment. Studies show that these technologies are already able to collect valuable data about the frequency and consistency of excretions, which can be used for the diagnosis of diarrhea.

Another significant area of research is the study of the effects of stress on the intestinal health of cats. Recent studies have shown that stress can lead to changes in the intestinal tract that trigger or worsen diarrhea. Researchers are therefore developing stress reduction strategies that could be used as part of a comprehensive treatment plan to relieve diarrhea.

Overall, research is also being conducted on how environmental factors, such as exposure to certain chemicals or foods, affect the risk of diarrheal diseases in cats. These studies provide important insights into how cat owners can keep their pets in a healthy environment and which substances should be avoided to minimize the risk of digestive problems.

Frequently Asked Questions (FAQs)

1. What is diarrhea in cats?
Diarrhea in cats is a common digestive disorder characterized by frequent, liquid, or soft stools. It can be short-term or become chronic if left untreated.
2. How do I recognize diarrhea in my cat?
Watch for frequent trips to the litter box, soft or watery stool, and possibly an unpleasant odor. Your cat may also appear lethargic or lose their appetite.
3. What are the most common causes of diarrhea in cats?
Common causes include dietary changes, infections, stress, parasites, allergies, or inflammatory bowel diseases. It is important to have the exact cause determined by a veterinarian.
4. Can stress trigger diarrhea in cats?
Yes, stress can affect the digestive system and lead to diarrhea. Changes in the environment, such as moving or a new pet, can cause stress.
5. When should I take my cat to the veterinarian?
If the diarrhea persists for more than one to two days, there is blood in the stool, or your cat shows additional symptoms such as vomiting or fever, a veterinarian should be consulted.
6. Can I give my cat home remedies for diarrhea?
Some home remedies, such as offering cooked chicken and rice, may help, but it is important to consult a veterinarian first to ensure it is appropriate for your cat.
7. How can I prevent diarrhea in my cat?
A regular, balanced diet, stress reduction, and avoiding sudden dietary changes can help prevent diarrhea. Regular veterinary checkups are also important.
8. Can my cat get diarrhea from their diet?
Yes, a sudden dietary change or consumption of unsuitable food can cause diarrhea. It is advisable to make food changes gradually.
9. Should I withhold water from my cat when they have diarrhea?
No, it is important that your cat has access to fresh water to prevent dehydration. Dehydration can occur quickly with diarrhea.
10. Can diarrhea be a sign of a serious illness?
Yes, diarrhea can indicate serious health problems such as kidney or liver disease. Therefore, it is important to have the cause determined by a veterinarian.