Diarrhea is a common digestive issue that affects cats of all ages and breeds. Various factors, including dietary changes, environmental stress, medical conditions, and parasitic infections, can cause it. Understanding the common causes of diarrhea in cats and knowing how to prevent and treat it can help ensure your feline friend stays healthy and happy.
Introduction
Overview of Article Topics
As pet owners, it’s crucial to keep an eye on our furry friend’s health, and one of the most common health issues cats face is diarrhea. While it’s a common problem, diarrhea in cats can be a symptom of an underlying health condition that needs to be addressed. In this article, we’ll discuss the causes of diarrhea in cats, how to identify them, and what you can do to prevent it from happening.
Definition of Diarrhea in Cats
Diarrhea is a common health problem in cats with loose, watery stools. Various factors, including dietary changes, food intolerances, bacterial infections, and stress, can cause it. It’s important to note that not all loose stools qualify as diarrhea, and keeping an eye on your cat’s bowel movements to identify any changes is essential.
Importance of Identifying the Common causes of diarrhea in cats
Identifying the causes of diarrhea in cats is essential for effective treatment. In some cases, diarrhea can indicate a severe underlying health issue, such as intestinal parasites or inflammatory bowel disease. If left untreated, these conditions can lead to chronic health problems that can be challenging to manage. By identifying the cause of diarrhea, you can ensure your cat gets the appropriate treatment.

Category A: Dietary causes
Diet plays a crucial role in a cat’s overall health, and dietary changes commonly cause diarrhea. This section will discuss some nutritional factors that can cause cat diarrhea.
Certain Food Types and Ingredients
Some cats may have food intolerances or sensitivities that can cause diarrhea. Common food allergens for cats include beef, dairy, and fish. Additionally, certain ingredients in cat food, such as soy, wheat, and corn, can also cause digestive issues in some cats.
It’s crucial to read the labels carefully when selecting cat food, especially if your cat has a history of digestive issues. High-quality cat food brands often use high-quality ingredients that are less likely to cause digestive problems.
Overfeeding and Feeding Human Food
Overfeeding your cat can also lead to diarrhea, as its digestive system may not be able to handle too much food at once. Feeding your cat the appropriate portion sizes for their age, weight, and activity level is essential.
Feeding your cat human food can also lead to diarrhea, as many human foods contain ingredients that are not suitable for cats. Additionally, sudden changes in diet, such as feeding your cat table scraps, can also cause digestive issues.
Overall, dietary changes are a common cause of diarrhea in cats. Certain food types and ingredients, overfeeding, and feeding human food can all lead to digestive problems in cats. It’s essential to read the labels carefully when selecting cat food and to feed your cat the appropriate portion sizes for its age, weight, and activity level. If your cat experiences diarrhea, it’s crucial to identify the specific cause to provide appropriate treatment.
1: Sudden diet changes
Sudden changes in a cat’s diet can cause diarrhea as its digestive system may not be able to handle the new food. Here’s how it happens:
When you suddenly switch your cat’s food, it can shock its digestive system. Cats have a sensitive digestive system, and changing their diet too quickly can disrupt the balance of their gut flora, leading to diarrhea.
Ways to transition cats to a new diet safely
To transition your cat to a new diet safely, it’s essential to do it gradually. Start by mixing a small amount of the fresh food with their current food and gradually increase the amount of the new food over a few weeks. This allows their digestive system to adjust slowly to the latest food, reducing the risk of digestive upset.
Additionally, it’s crucial to ensure that the new food is nutritionally balanced and appropriate for your cat’s age, weight, and activity level. Consult with your veterinarian if you need clarification on what food to choose or how to transition your cat to a new diet. Doing so can help prevent diarrhea and other digestive issues in your cat.
2: Low-quality cat food
Low-quality cat food can cause diarrhea because it may contain low-quality ingredients or lack the necessary nutrients that cats need for healthy digestion. Here’s how to identify low-quality cat food and what to look for in high-quality options.
How to identify low-quality cat food
Low-quality cat food often contains fillers and by-products that are not easily digestible by cats, leading to digestive issues such as diarrhea. Additionally, it may lack essential nutrients that cats need, such as protein, fats, and vitamins.
To identify low-quality cat food, read the ingredients list carefully. If the first ingredient is a grain or a by-product, it may not be of high quality. Additionally, if the food contains artificial preservatives, colors, or flavors, it may not be the best choice for your cat.
Recommendations for high-quality cat food options
High-quality cat food contains high-quality ingredients and is nutritionally balanced for cats. Look for cat food that lists meat as the first ingredient and does not contain fillers such as corn, wheat, or soy. Additionally, it should not contain artificial preservatives, colors, or flavors.
Choosing cat food appropriate for your cat’s age, weight, and activity level is also essential. Consult with your veterinarian to determine the best food options for your cat. By selecting high-quality cat food, you can help prevent diarrhea and promote overall digestive health in your cat.
3: Food allergies and intolerances
Food allergies and intolerances can cause diarrhea in cats because they can trigger an immune response in the digestive system. Here’s what you need to know about cat food allergies and intolerances.
Common allergens and intolerances in cats
Common food allergens in cats include chicken, fish, beef, and dairy products. Food intolerances can also occur, and common triggers include grains such as corn, wheat, and soy.
When a cat is allergic or intolerant to a food, their immune system may produce an inflammatory response that can cause diarrhea, vomiting, and other digestive issues. Identifying the allergen or intolerance is essential to prevent further digestive upset.
Diagnosis and treatment options
If you suspect your cat has a food allergy or intolerance, consult your veterinarian. They can perform diagnostic tests, such as elimination diets or blood tests, to identify allergens or intolerance.
Treatment involves avoiding the allergen or intolerance, which may mean switching to a different cat food or avoiding certain ingredients. Your veterinarian may also recommend probiotics or other digestive supplements to help soothe the digestive system and improve overall gut health.
You can help prevent diarrhea and other digestive issues in your cat by identifying and avoiding food allergens or intolerances.

Category B: Environmental causes
Environmental factors can play a significant role in causing diarrhea in cats. Stress, anxiety, and exposure to toxins are common environmental factors affecting a cat’s digestive system. Here’s what you need to know about the ecological causes of cat diarrhea.
How stress and anxiety can cause digestive issues
Stress and anxiety can lead to diarrhea in cats because they can cause changes in the digestive system. These changes can lead to increased inflammation and decreased nutrient absorption, resulting in diarrhea.
Common causes of stress and anxiety in cats include changes in routine, the introduction of new pets, and loud noises. To help reduce stress and anxiety, provide your cat with a calm and safe environment. Consider using pheromone sprays or diffusers to help promote relaxation.
How environmental toxins can cause diarrheaToxins
Exposure to environmental toxins can also cause diarrhea in cats. Common toxins include pesticides, cleaning products, and household chemicals. Cats can ingest these toxins by licking their paws or fur after contacting contaminated surfaces.
To prevent exposure to environmental toxins, ensure that all cleaning products and chemicals are safely stored away from your cat’s reach. Additionally, avoid using pesticides and other chemicals around areas where your cat spends time.
If you suspect your cat has been exposed to environmental toxins, seek immediate veterinary attention.
Diarrhea in cats can have various causes, including dietary and environmental factors. Identifying and addressing the underlying cause is crucial to preventing and treating diarrhea. By providing a balanced and high-quality diet, reducing stress and anxiety, and limiting exposure to environmental toxins, you can help promote your cat’s digestive health and overall well-being.
1: Changes in the environment
Changes in a cat’s environment can be stressful and can lead to diarrhea. Cats are creatures of habit and prefer consistency in their routines and surroundings. Here’s what you need to know about how environmental changes can cause cat stress and anxiety and how to minimize the impact.
How changes in the environment can cause stress and anxiety
Changes in the environment, such as moving to a new home or introducing a new pet, can cause stress and anxiety in cats. This can lead to digestive issues such as diarrhea. Cats may also experience anxiety and stress due to changes in their daily routine or loud noises.
Tips for minimizing stress during changes
To help minimize stress and anxiety during changes in the environment, it’s crucial to provide your cat with a calm and safe environment. Keep their food, water, and litter box in the exact location and try to maintain their daily routine as much as possible. This will help provide a sense of familiarity and stability for your cat.
Consider using pheromone sprays or diffusers to help promote relaxation. Provide your cat with a safe and quiet space if they feel overwhelmed.
Changes in the environment can be stressful for cats and lead to diarrhea. Minimizing stress and anxiety during these changes can help promote a sense of calm and stability for your cat, improving their overall well-being and digestive health.
2: Toxins and poisons
Changes in a cat’s environment can be stressful and can lead to diarrhea. Cats are creatures of habit and prefer consistency in their routines and surroundings. Here’s what you need to know about how environmental changes can cause cat stress and anxiety and how to minimize the impact.
How changes in the environment can cause stress and anxiety
Changes in the environment, such as moving to a new home or introducing a new pet, can cause stress and anxiety in cats. This can lead to digestive issues such as diarrhea. Cats may also experience anxiety and stress due to changes in their daily routine or loud noises.
Tips for minimizing stress during changes
To help minimize stress and anxiety during changes in the environment, it’s crucial to provide your cat with a calm and safe environment. Keep their food, water, and litter box in the exact location and try to maintain their daily routine as much as possible. This will help provide a sense of familiarity and stability for your cat.
Consider using pheromone sprays or diffusers to help promote relaxation. Provide your cat with a safe and quiet space if they feel overwhelmed.
Changes in the environment can be stressful for cats and lead to diarrhea. Minimizing stress and anxiety during these changes can help promote a sense of calm and stability for your cat, improving their overall well-being and digestive health.

Category B: Medical causes
Several medical conditions can cause diarrhea in cats. Here’s an overview of some of the most common diseases and the role of infections and medications in causing diarrhea.
Overview of medical conditions that can cause diarrhea in cats
Some common medical conditions that can cause cat diarrhea include inflammatory bowel disease (IBD), pancreatitis, and kidney disease. These conditions can cause chronic diarrhea, requiring ongoing management and treatment.
How diseases and infections can cause digestive issues
Infections
Infections like bacterial or viral infections can also cause cat diarrhea. Common diseases include feline infectious peritonitis (FIP) and feline leukemia virus (FeLV). These infections can cause acute diarrhea and may require veterinary treatment.
Medications
Certain medications, such as antibiotics, can cause diarrhea in cats. This is because antibiotics can disrupt the balance of bacteria in the gut, leading to digestive upset. Other medications, such as non-steroidal anti-inflammatory drugs (NSAIDs), can cause diarrhea in some cats.
Treatment Options
The treatment for medical causes of diarrhea in cats will depend on the underlying condition. In some cases, such as with infections, you may require medication. In other cases, you may recommend dietary changes or supplements. Working with your veterinarian to determine the best treatment for your cat is essential.
1: Gastrointestinal diseases
Gastrointestinal diseases are a common cause of diarrhea in cats. Some of the most common gastrointestinal diseases that can cause diarrhea include inflammatory bowel disease (IBD), small intestine bacterial overgrowth (SIBO), and intestinal parasites.
Common gastrointestinal diseases that can cause diarrhea
Symptoms of gastrointestinal diseases can include diarrhea, vomiting, loss of appetite, and weight loss. Diagnosis may require blood tests, fecal analysis, and imaging tests such as X-rays or ultrasounds.
Symptoms, diagnosis, and treatment options
Treatment options for gastrointestinal diseases will depend on the underlying condition. For example, You can manage IBD with dietary changes, medication, or a combination. Intestinal parasites may be treated with medication, while SIBO may require antibiotic treatment and dietary changes.
Working with your veterinarian to properly diagnose and treat gastrointestinal diseases in cats is essential. Proper management allows many cats with gastrointestinal disorders to lead happy, healthy lives.
2: Infections
How infections can cause diarrhea in cats
Infections can also be a cause of diarrhea in cats. Common infections that can lead to diarrhea include viral, bacterial, and parasitic infections.
Common infections and their symptoms
Symptoms of infections can vary depending on the type of infection but may include diarrhea, vomiting, fever, and lethargy. In some cases, conditions can be severe and may require hospitalization.
Treatment and prevention options
Treatment options for infections will depend on the specific type of infection. For bacterial infections, antibiotics may be prescribed, while you may use antiviral medications to treat viral infections. You may treat parasitic infections with medication or other interventions such as deworming.
Prevention of infections in cats can be achieved through routine vaccinations and preventative care. Additionally, practicing good hygiene, such as washing your hands regularly and properly handling and storing food, can help prevent the spread of infections.
3: Medications
How certain medications can cause diarrhea in cats
Certain medications can cause diarrhea in cats as a side effect. Common medications that may lead to diarrhea include antibiotics, anti-inflammatory drugs, and chemotherapy.
Common medications that can cause diarrhea
Suppose a cat experiences diarrhea as a side effect of medication. In that case, contacting the veterinarian who prescribed the drug is essential. The vet may recommend changing the medication or adjusting the dosage to reduce the side effects.
What to do if a cat experiences diarrhea as a side effect of medication
It is essential to never give cats any medication without first consulting with a veterinarian. Some medicines that are safe for humans or other animals may be toxic to cats and can cause serious health problems, including diarrhea.
Category 4: Parasitic causes
Overview of parasitic causes of diarrhea in cats
Parasites are a common cause of diarrhea in cats. Several parasites can cause digestive issues, including roundworms, hookworms, tapeworms, and giardia.
How parasites can cause digestive issues
When parasites enter a cat’s body, they can cause inflammation and irritation in the intestines, leading to diarrhea and other digestive symptoms. In addition to diarrhea, cats with parasitic infections may experience weight loss, vomiting, and lethargy.
Common parasites in cats
Common cat parasites include roundworms, transmitted through infected feces or soil, and hookworms, which you can pick up from contaminated soil or other animals. You can contract tapeworms by ingesting infected fleas, rodents, or raw meat. In contrast, giardia is often acquired from contaminated water sources.
Suppose a cat is suspected of having a parasitic infection. In that case, a veterinarian can perform tests to confirm the diagnosis and prescribe appropriate treatment. Treatment options for parasitic infections in cats typically include medication to eliminate the parasites and supportive care to manage symptoms such as diarrhea.
Prevention is vital in protecting cats from parasitic infections. Regular deworming and fecal exams and keeping litter boxes and living spaces clean and free from feces can help reduce the risk of parasitic infections in cats. Additionally, flea control measures can help prevent tapeworm infections.
1: Intestinal parasites
Common intestinal parasites in cats
Intestinal parasites are a common cause of diarrhea in cats. Some of the most common intestinal parasites affecting cats include roundworms, hookworms, tapeworms, and whipworms. These parasites can infect cats by ingesting contaminated food, water, or soil or by contacting infected animals.
Symptoms, diagnosis, and treatment options
Symptoms of intestinal parasites in cats can include diarrhea, vomiting, weight loss, and poor coat condition. These parasites can cause anemia, dehydration, and even death in severe cases.
To diagnose intestinal parasites in cats, a veterinarian will typically perform a fecal examination to look for the presence of parasite eggs or larvae. Treatment options may include medications to eliminate the parasites and supportive care such as fluid therapy and nutritional support.
Preventing intestinal parasites in cats involves:
Minimizing their exposure to contaminated environments.
Regularly deworming them.
Keeping their living spaces clean and sanitary.
It is also essential to keep cats away from potentially infected animals, such as those that are sick or stray.
2: Fleas and ticks
How fleas and ticks can cause diarrhea
Fleas and ticks are external parasites that can cause diarrhea in cats. When fleas and ticks bite, they can transmit bacteria and viruses, leading to digestive issues. Additionally, some cats may be allergic to flea and tick saliva, which can cause diarrhea.
Prevention and treatment options
To prevent fleas and ticks from infesting your cat, it’s essential to use a flea and tick preventative medication. There are many different types available, including topical treatments and oral drugs. Talk to your veterinarian about the best option for your cat.
If your cat gets fleas or ticks, it’s essential to treat them promptly to prevent the infestation from worsening. Your veterinarian can recommend a treatment plan based on the severity of the infestation.
Overall, preventing fleas and ticks is vital in preventing diarrhea in cats. By using preventative measures and treating any infestations promptly, you can help keep your cat healthy and happy.
3: Other parasites
Other parasites that can cause diarrhea in cats
Other parasites that can cause diarrhea in cats include coccidia, giardia, and roundworms. These parasites can be transmitted through contaminated food, water, soil, or contact with infected animals.
Symptoms and treatment options
Symptoms of parasitic infections can include diarrhea, vomiting, weight loss, and lethargy. Treatment options may include medication to kill the parasites and supportive care such as fluids and electrolyte replacement. Deworming cats regularly and keeping their environment clean to prevent parasitic infections is vital.
Conclusion
In conclusion, diarrhea in cats can be caused by various factors such as sudden diet changes, low-quality cat food, food allergies and intolerances, environmental causes such as stress and anxiety, exposure to toxins and poisons, medical conditions, and parasites.
Sudden changes in diet and low-quality cat food can lead to digestive issues. Identifying the symptoms and diagnosing the cause of diarrhea in cats is crucial to provide appropriate treatment options. Prevention is also vital, such as gradually transitioning to a new diet, providing high-quality cat food, minimizing environmental stressors, preventing exposure to toxins and poisons, and regularly deworming cats. In case of any concerns, it is always recommended to consult a veterinarian for professional advice.
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Roberts is an animal lover who has experienced almost 20 years caring for cats and dogs. He learned about pet care by doing research and reading many books. He and his team started a blog to share their knowledge and serve others. Read More