Hepatic lipidosis, or fatty liver disease, is the most common serious liver disease in cats and is caused by rapid fat mobilisation when a cat stops eating. When a cat goes without food for as little as 24–48 hours, the liver becomes overwhelmed processing fat, impairing its function. It can be fatal without aggressive nutritional support.
Unlike most liver diseases in other species, hepatic lipidosis in cats is directly caused by not eating rather than by a toxin or infection. When a cat stops eating, fat reserves are rapidly mobilised and transported to the liver for energy conversion. The feline liver has a limited capacity to process this fat influx and becomes engorged with lipid deposits, disrupting normal liver function.
Hepatic lipidosis can develop in any cat that stops eating, but obese cats are at highest risk because they have larger fat reserves to mobilise rapidly. The condition often begins as a secondary response to another illness (dental pain, stress, upper respiratory infection, a change in environment) that causes the cat to stop eating, with hepatic lipidosis then developing as a complication.
Treatment requires nutritional support delivered via feeding tube in most cases — a nasoesophageal, oesophagostomy, or gastrostomy tube is placed to allow consistent caloric intake while the liver recovers. Treatment typically takes 4–8 weeks. With aggressive treatment, prognosis is good (60–80% recovery). Without treatment, the condition is fatal. This is why any cat that stops eating for 24–48 hours needs veterinary evaluation urgently, not watchful waiting.
📌 Key Facts
Risk onset: As little as 24–48 hours without food
Highest risk group: Obese cats
Primary treatment: Nutritional support via feeding tube
Recovery rate with treatment: 60–80% with aggressive care
Frequently Asked Questions about Hepatic Lipidosis (Fatty Liver Disease)
Q: My cat has not eaten for two days. Is this an emergency?
Yes. A cat that has not eaten for 48 hours should be seen by a veterinarian — not because two days without food is immediately fatal, but because hepatic lipidosis can begin developing within that window, and treatment is significantly more successful when started early before liver damage advances.
Q: Can hepatic lipidosis be prevented?
The best prevention is ensuring your cat always has access to food they will eat, promptly investigating any reduction in appetite, and maintaining a healthy body weight. Never put a cat on a crash diet or rapid weight loss programme without veterinary supervision — gradual, controlled weight loss is essential.
Q: Will my cat recover fully from hepatic lipidosis?
Many cats recover completely with aggressive treatment. The liver has excellent regenerative capacity once the fat deposits are cleared through sustained nutritional support. Recovery takes weeks to months, and follow-up bloodwork confirms when liver values have returned to normal.
⚠ Medical Disclaimer: This glossary entry is for educational purposes only
and does not constitute veterinary advice. Always consult a licensed veterinarian for diagnosis
and treatment of your pet's health conditions.