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Bloody Feces in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Urgent see a veterinarian within 24 hours

RED FLAG with large amounts of blood, circulatory signs (pale, weak, prolonged CRT), melena, repeated vomiting, fever/apathy, or if the animal is very young.

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

Definition

‘Bloody feces’ in cats describes the condition in which blood is visible in the cat’s stool. This can appear either as red blood, indicating bleeding in the lower intestinalIntestinal refers to the intestine, the part of the digestive tract that extends from the stomach to the anus. Intestinal diseases affect the small and/or large intestine. tract, or as dark, tarry stool, indicating bleeding in the upper digestive tract.

Can Occur with the Following Diseases:

Basics and possible causes

Blood in a cat’s stool can have various causes, ranging from relatively harmless to serious. A cat’s gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. tract is a complex system in which food is ingested, digested, and excreted. Disruptions in this system can lead to visible signs such as bloody stool.

One of the most common causes of bloody feces is inflammation of the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients., which can be caused by infections, parasites, or food intolerances. Infections caused by bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. such as Salmonella or viruses such as felineFeline refers to anything related to cats. The term is used to describe diseases, behaviors, or anatomical aspects that are specific to cats. parvovirus can damage the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients. and cause bleeding.

Parasites such as hookworms or whipworms feed on the cat’s blood and can thus lead to bloody stool. Another possible cause is foreign bodies in the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients., which can lead to mechanical injuries and bleeding.

Dietary causes include food allergies or intolerances, which can lead to an inflammatory reaction in the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients.. Sudden dietary changes can also stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. the cat’s digestive system and cause similar symptoms.

More serious causes can be ulcers, tumors, or other growths in the digestive tract. In these cases, the blood is often dark and the stool tarry, as the blood is already digested in the upper digestive tract.

Typical accompanying symptoms

DiarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.: Soft or liquid stool often occurs together with bloody feces and may indicate irritation or inflammation of the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients..
Vomiting: In addition to bloody stool, vomiting can be a sign that the cat’s digestive tract is disturbed.
Loss of appetite: A sick cat may lose interest in food, which indicates a general illness or stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. in the digestive system.
Weight loss: Long-term blood loss or inadequate nutrient intake can lead to weight loss.
Lethargy: A cat that feels unwell or suffers from anemia may appear lethargic.
AbdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. pain: The cat may show signs of pain, such as a crouched posture or sensitivity when touching the abdomenThe abdomen, also known as the abdominal cavity, is the part of the body located between the rib cage and the pelvis. It houses several important organs, including the stomach, liver, kidneys, intestines, and spleen..

When to see a vet?

Blood in a cat’s stool should never be ignored, especially if it occurs repeatedly or is accompanied by other symptoms. An immediate veterinary visit is required if the cat shows signs of weakness, persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. vomiting, severe diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., or visible pain.

If the bloody stool is accompanied by serious symptoms such as severe weight loss, fever, or altered behavior, a veterinarian should also be consulted immediately. These symptoms may indicate a serious underlying condition that requires immediate treatment.

Even if the bleeding only occurs once and the cat otherwise appears healthy, it is advisable to consult a veterinarian to clarify the cause and avoid possible health risks.

Symptom recognition for the pet owner and veterinary diagnostic procedure

Detection of bloody feces by the pet owner usually occurs through visual inspection of the litter box. Abnormalities in the stool, such as bright red blood or tarry, dark feces, should be noted. It is helpful to provide the veterinarian with as accurate information as possible about the frequency and appearance of the stool as well as any accompanying symptoms.

The veterinarian will conduct a thorough examination, which typically includes a physical examination of the cat. Additionally, blood tests, fecal analyses, and imaging procedures such as X-rays or ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. may be necessary to determine the exact cause of the bleeding.

In some cases, an endoscopyEndoscopy is a diagnostic procedure that uses an endoscope (a thin, flexible tube with a light source and a camera at the end) to examine and visualize the inside of the body, often for diagnostic or therapeutic purposes. may be necessary to visually inspect the gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. tract and take samples for a biopsyA biopsy is a medical procedure in which a small amount of tissue is removed from the body to be examined under a microscope for signs of disease. Biopsies can help diagnose cancer and other conditions.. These procedures help identify inflammatory conditions, ulcers, or tumors that could be responsible for the bleeding.

What the pet owner can do and professional therapy options

As a first measure, the pet owner should monitor the cat’s feeding and ensure that no sudden dietary changes or suspicious foods are the cause of the symptoms. An easily digestible diet can help relieve the digestive tract.

It is important to observe the cat closely and note all changes in behavior or condition to provide the veterinarian with a comprehensive overview. If no serious symptoms such as vomiting or lethargy occur, the pet owner can wait to see if the situation stabilizes on its own, but should not hesitate to consult a veterinarian if symptoms persist.

Access to fresh water should always be ensured to maintain adequate hydration, especially if the cat is suffering from diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Pet owners should avoid administering medications independently without first seeking the advice of a veterinarian.

Outlook on current research

Current research is intensively investigating how specific dietary adjustments can influence the occurrence of bloody feces in cats. Studies show that a balanced diet rich in fiber and low in allergens can help alleviate this symptom. Research findings suggest that feeding hypoallergenic diets can significantly reduce the inflammatory response in the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients.. This is supported by the study of the immune responseAn immune response is the immune system's reaction to foreign substances (antigens), such as microorganisms or proteins. It involves a series of processes aimed at recognizing, fighting, and eliminating these antigens. to various proteinProteins are large molecules made up of amino acids and play an essential role in almost all biological processes. They are necessary for building body tissue, the function of the immune system, and as enzymes for metabolic reactions. sources in cats with sensitive gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. tracts.

Another area of research focuses on the role of the gut microbiota in cats. Scientists are investigating how disrupted intestinalIntestinal refers to the intestine, the part of the digestive tract that extends from the stomach to the anus. Intestinal diseases affect the small and/or large intestine. flora can contribute to the development of bloody feces. It is believed that an imbalanceImbalance refers to an imbalance or disruption of normal function or composition in the body, which can lead to health problems. in the microbial community in the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients. promotes inflammatory conditions that can lead to bloody stool. By administering probiotics, researchers are attempting to restore the natural bacterial balance in the intestineThe intestine is the medical term for the gut, including the small intestine (intestinum tenue) and the large intestine (intestinum crassum). It plays a central role in the digestion and absorption of nutrients. to improve digestive system health.

Additionally, there are advances in genetic research aimed at identifying genetic predispositions for gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. problems in cats. By examining genetic markers in cats that frequently suffer from bloody feces, scientists hope to develop more targeted therapies. This research could contribute in the long term to creating individualized treatment plans specifically tailored to the genetic needs of each cat.

The role of environmental factors is also being intensively researched in connection with bloody feces in cats. Studies have shown that stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. factors such as changes in the daily environment or sudden changes in a cat’s routine can be linked to the occurrence of gastrointestinalGastrointestinal refers to the gastrointestinal tract, a system that extends from the oral cavity to the anus and is responsible for the digestion of food and the absorption of nutrients. symptoms. Research on behavioral modification and environmental enrichment aims to reduce stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. levels in cats and thus minimize the risk of bloody feces.

Finally, new diagnostic techniques are another focus of current research. Advanced imaging procedures and endoscopyEndoscopy is a diagnostic procedure that uses an endoscope (a thin, flexible tube with a light source and a camera at the end) to examine and visualize the inside of the body, often for diagnostic or therapeutic purposes. methods enable more accurate and less invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of intestinalIntestinal refers to the intestine, the part of the digestive tract that extends from the stomach to the anus. Intestinal diseases affect the small and/or large intestine. problems in cats. Through early and precise detection of abnormalities in the digestive tract, veterinary professionals can offer more targeted treatments that reduce the risk of complications such as bloody feces.

Frequently asked questions

1. What are common causes of bloody stool in cats?

Bloody feces in cats can be caused by a variety of factors, including parasites, infections, inflammatory conditions, traumas, or even dietary changes. It is important to determine the exact cause through a veterinary examination.

2. Is bloody stool in cats always a cause for concern?

Bloody feces should never be ignored, as it can indicate serious health problems. Immediate veterinary examination is advisable to identify the cause and initiate appropriate treatment.

3. Can stress in cats lead to bloody feces?

Yes, stress can lead to gastrointestinal problems in some cats, which can manifest as bloody feces. Factors such as a new environment, changes in the household, or the loss of a companion can trigger stress.

4. What role does nutrition play in bloody stool?

An unsuitable diet can lead to gastrointestinal problems that cause bloody feces. A balanced diet tailored to the cat's needs can help minimize the risk.

5. Can home remedies help with bloody stool?

While some home remedies can help alleviate symptoms, bloody feces should always be examined by a veterinarian. Professional diagnosis and therapy are crucial.

6. How is the cause of bloody stool diagnosed?

A veterinarian can use various diagnostic procedures, including blood tests, fecal samples, ultrasound, or X-rays, to determine the cause of bloody feces.

7. What treatments are common for bloody stool?

The treatment depends on the underlying cause. It may include medications, dietary changes, treatment of parasites, or in severe cases, surgical interventions.

8. Can bloody feces indicate an infection?

Yes, bloody feces can indicate a bacterial, viral, or parasitic infection. A veterinary examination is necessary to determine the exact cause.

9. How can you prevent bloody stool in cats?

A balanced diet, regular veterinary checkups, parasite control, and stress minimization can help reduce the risk of bloody feces.

10. When should I go to the vet if my cat has bloody stool?

As soon as you notice bloody feces in your cat, you should consult a veterinarian as quickly as possible. Early diagnosis and treatment can prevent serious complications.