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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →“Hepatitis” in cats can refer to different liver problems, so the specific diagnosis matters. One important inflammatory condition is cholangitis or cholangiohepatitis; hepatic lipidosis, or fatty liver, is a separate disorder that can develop when a cat stops eating. If your cat is not eating, is vomiting persistently, or looks jaundiced, contact a veterinarian promptly. These signs need an examination, not home diagnosis or treatment.
What does hepatitis mean in cats?
Hepatitis broadly means inflammation of the liver, but it does not identify one uniform disease. In cats, a common acquired inflammatory liver condition is cholangitis, inflammation involving the bile ducts. When inflammation extends into nearby liver tissue, it is called cholangiohepatitis. Merck Veterinary Manual describes feline cholangitis/cholangiohepatitis syndrome as the most common acquired inflammatory liver disease in domestic cats; that is a qualitative description, not a prevalence estimate. Merck Veterinary Manual: Feline Cholangitis / Cholangiohepatitis Syndrome
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Hepatic lipidosis (“fatty liver”) is different: it is a syndrome in which fat builds up in the liver, often after illness or another stressor leads a cat to eat too little or stop eating. It can occur alongside another liver problem, but it is not another name for cholangitis. Merck Veterinary Manual: Feline Hepatic Lipidosis
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Signs vary by disease and may overlap with many other illnesses, so they cannot confirm hepatitis on their own. Reported signs of cholangiohepatitis include:
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- Reduced appetite or refusing food
- Vomiting
- Weight loss
- Jaundice, a yellow tint to the eyes, gums, or skin
- Fever, lethargy, dehydration, or sometimes abdominal pain
Some neutrophilic (suppurative) cases can begin more acutely and severely. Lymphocytic disease may be subtle or progress gradually, with signs such as intermittent vomiting, listlessness, or slow weight loss. A cat can have the condition without showing every listed sign. Cornell Feline Health Center: Cholangiohepatitis
Why appetite loss deserves prompt attention
Not eating can be both a sign of illness and a risk in its own right. In hepatic lipidosis, food deprivation can prompt fat mobilization that overwhelms the liver’s ability to process it. Merck describes dramatic weight loss in affected cats, sometimes greater than 25%; this is a possible clinical feature, not a threshold to wait for before seeking help. Contact your veterinarian promptly if your cat stops eating, particularly if there is vomiting, weakness, or yellowing. Merck Veterinary Manual: Feline Hepatic Lipidosis
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What can cause liver inflammation in cats?
Causes depend on the specific condition. Cholangitis/cholangiohepatitis may be neutrophilic (suppurative) or lymphocytic, and the course and suspected cause can differ. Cats may also have inflammation of the pancreas and intestines at the same time; this combination is often called triaditis. In tropical and subtropical areas, liver-fluke infection is one possible cause for cats exposed through prey such as lizards, geckos, or toads. That possibility is not equally relevant to every cat or location. Cornell Feline Health Center: Cholangiohepatitis
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Hepatic lipidosis is multifactorial. A cat may stop eating because of an underlying illness or stressor, and the resulting food deprivation can trigger excessive fat accumulation in liver cells. Finding and addressing the reason for appetite loss is therefore part of veterinary care, not a separate optional step. Merck Veterinary Manual: Feline Hepatic Lipidosis
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How do veterinarians diagnose hepatitis in cats?
The workup depends on what the veterinarian suspects and how ill the cat is. It commonly begins with the history and physical examination, followed by blood tests and abdominal ultrasound. Bloodwork may show increased liver enzyme activity or bilirubin; ultrasound can assess the liver and biliary structures and may reveal changes associated with other disease. Neither a symptom nor a single blood result establishes the diagnosis.
For suspected cholangitis/cholangiohepatitis, a veterinarian may sometimes make a presumptive diagnosis using the clinical picture, bloodwork, and ultrasound. A liver sample or biopsy may be needed to identify the specific inflammatory form or establish a definitive diagnosis, although biopsy is not feasible in every case. For suspected hepatic lipidosis, evaluation may also include an ultrasound-guided liver aspirate; biopsy can be needed to investigate an underlying condition. Merck Veterinary Manual: Feline Cholangitis / Cholangiohepatitis Syndrome Cornell Feline Health Center: Cholangiohepatitis
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How is hepatitis in cats treated?
Treatment is tailored to the diagnosis, severity, and cause. A seriously ill cat may need hospitalization for fluids and supportive care. Depending on the findings, veterinary treatment may include anti-nausea medication, antibiotics when bacterial infection is suspected or confirmed, vitamins, other medicines, or surgery for a selected obstruction. Acute infectious disease and chronic inflammatory disease may require different medication plans, so drug choice and duration belong with the veterinarian. Merck Veterinary Manual: Disorders of the Liver and Gallbladder in Cats Cornell Feline Health Center: Cholangiohepatitis
Nutrition support may be part of treatment
Maintaining or restoring food intake is especially important when a cat has hepatic lipidosis or is at risk of developing it. The veterinary team may correct fluid, electrolyte, and metabolic problems and set a feeding plan. If a cat cannot eat enough on its own, nutrition may be delivered through a feeding tube placed and managed as clinical care, sometimes with continued care at home under veterinary instructions. Do not force a feeding plan, substitute a supplement, or choose a therapeutic diet without veterinary guidance. Merck Veterinary Manual: Feline Hepatic Lipidosis Cornell Feline Health Center: Cholangiohepatitis
Quick Recap
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- Liver Support for Dogs and Cats: Denamarin is the #1 veterinarian recommended liver support supplement for dogs and cats. This supplement contains s-adenosylmethionine (SAMe) to help increase levels of the antioxidant glutathione - one of the liver’s main detoxifying agents
- High-Quality Ingredients: The Silybin found in Denamarin has shown better absorption by dogs and cats than the standardized milk thistle extract found in many other products
- Support Your Dog and Cat's Liver Health: The liver is one of the most vital organs in your pet and is responsible for removing toxins, storing energy, aiding digestion, and supporting the immune system
- From the #1 Veterinarian Recommended Supplement Company*: Nutramax Laboratories Veterinary Sciences has been a leader in pet health for over 30 years, and provides supplements to support joint health, digestive health, and overall wellness
- Backed by Science: Nutramax Laboratories Veterinary Sciences supplements are veterinarian formulated with high-quality ingredients to ensure your pet is receiving a safe supplement
When should you contact a veterinarian?
- Call promptly if your cat stops eating, develops yellow eyes or gums, or has persistent vomiting.
- Seek urgent veterinary advice if your cat is very weak, severely lethargic, dehydrated, or appears painful.
- Do not wait for a particular amount of weight loss or try to confirm liver disease from signs at home. Several serious conditions can look alike, and timely assessment helps determine the right treatment.
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