Cat Fatty Liver Disease: Hepatic Lipidosis Symptoms & Care
Hepatic lipidosis — fatty liver disease — is the most common severe liver disease in cats and develops when an overweight cat stops eating for as little as two to three days. Fat floods the liver faster than it can process, jaundice sets in, and untreated cats die within 7 to 14 days. With aggressive feeding-tube nutrition, survival is 80 to 90 percent, but every hour of continued anorexia matters.
Last reviewed: May 2026
What Is Hepatic Lipidosis in Cats?
Hepatic lipidosis is a metabolic liver disease in which fat accumulates in liver cells faster than the liver can mobilize it, causing acute liver failure. It occurs when a cat — usually overweight — stops eating, and the body begins breaking down stored fat. Cats are uniquely poor at processing large amounts of fatty acids in the liver, so the cells swell with triglyceride droplets and stop functioning normally. Roughly half of cats with hepatic lipidosis have an underlying disease (pancreatitis, IBD, diabetes, cancer) triggering the anorexia, while the rest develop it after a stressor like a move, a new pet, or boarding (Valtolina & Favier, 2017, JFMS).
The disease is most common in middle-aged, overweight indoor cats but can affect any cat that goes off food. Once started, hepatic lipidosis is self-perpetuating — the sicker the cat feels, the less it eats, and the worse the liver gets, as outlined in Ettinger's Textbook of Veterinary Internal Medicine.
Early Warning Signs Owners Notice First
The earliest sign is simply that your cat stops eating, or eats noticeably less, for 48 to 72 hours. Cats normally do not skip meals, so any cat that has not finished its food bowl for two consecutive days needs evaluation. Weight loss can be dramatic — 25 percent or more of body weight may disappear in two to three weeks. Many owners notice that the spine, hip bones, and shoulder blades suddenly feel sharper under their hand.
Vomiting occurs in roughly 65 to 75 percent of cases and is often intermittent at first. Lethargy, hiding, and decreased grooming follow within days. Drooling can develop because nausea makes swallowing unpleasant, and constipation is common because there is no food going in.
Advanced Signs — When Jaundice Appears
By the time jaundice (icterus) develops, the cat has been sick for at least a week and the liver is failing. Look at the whites of the eyes, the gums, and the skin inside the ears under bright light — a yellow tint, even subtle, is an emergency. Up to 95 percent of cats with hepatic lipidosis are jaundiced by the time of diagnosis. Other late signs include drooling thick saliva, ventroflexion of the neck (a hunched, downward head posture), tremors, and seizures from hepatic encephalopathy. Hepatic encephalopathy occurs in about 5 to 10 percent of cases and signals severe disease.
How Vets Diagnose Fatty Liver
Diagnosis combines history (overweight cat, anorexia, jaundice) with bloodwork and imaging. Liver enzymes — ALT, ALP, and GGT — are typically markedly elevated, with ALP rising disproportionately compared to GGT, a pattern fairly specific for hepatic lipidosis. Bilirubin is elevated in essentially all jaundiced cats. Ultrasound shows a diffusely enlarged, brightly echogenic (hyperechoic) liver. Definitive diagnosis is by fine-needle aspirate cytology of the liver, which shows hepatocytes ballooned with fat vacuoles in more than 80 percent of cells. Aspirates are quick, low-risk, and usually do not require general anesthesia.
Treatment — Why a Feeding Tube Is the Standard of Care
Aggressive nutritional support is the only proven treatment. Cats need 50 to 60 kcal per kilogram of ideal body weight per day, fed slowly via a feeding tube — esophagostomy (E-tube) tubes are most common because they can be placed under brief anesthesia and used at home for weeks. Trying to feed by mouth alone fails in the vast majority of cases because the cat feels too nauseous and force-feeding builds food aversion. With proper tube feeding, survival is 80 to 90 percent (Chan, 2009, JFMS).
Supportive care includes IV fluids with potassium and phosphorus supplementation (refeeding syndrome is a real risk), anti-nausea medication (maropitant, ondansetron), B12 injections, and treatment of any underlying disease. Most cats need the tube for two to six weeks until appetite returns on its own.
Prevention — Don't Let an Overweight Cat Skip Meals
Hepatic lipidosis is largely a disease of preventable weight gain combined with sudden anorexia. Keep your cat at a body condition score of 4 to 5 out of 9 (you should easily feel ribs without seeing them), as outlined in the WSAVA Global Nutrition Guidelines, 2011. If your cat does need to lose weight, do it gradually — no more than 1 to 2 percent of body weight per week — and never by starvation. Any cat that misses two meals in a row, or eats noticeably less for two days, needs a vet visit, not a wait-and-see plan.
When to See a Vet
Not every symptom is a midnight emergency, but some warrant same-day attention and a few are true ERs. Use the lists below to sort which bucket you're in.
Call your vet today if:
- Cat has eaten significantly less or skipped meals for 48 hours
- Sudden weight loss, especially in an overweight cat
- Persistent vomiting more than twice in 24 hours
- Drooling thick saliva or grinding teeth
- Cat hiding more than usual or noticeably less active
Go to the ER immediately if:
- Yellow tint to gums, whites of eyes, or ear skin (jaundice)
- Cat has not eaten anything at all for 72 hours
- Tremors, seizures, head pressing, or disorientation
- Collapse, extreme weakness, or unresponsiveness
- Vomiting blood or passing black tarry stool
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Frequently Asked Questions
How fast does hepatic lipidosis develop in cats?
Hepatic lipidosis can begin developing after just two to three days of complete anorexia in an overweight cat. Clinically obvious illness usually appears within 7 to 14 days. The disease is faster and more severe in heavier cats — a 15-pound cat that stops eating is at much higher risk than a 9-pound cat with the same fasting duration.
How much does treating cat fatty liver cost?
Initial vet exam runs $50–150 and bloodwork adds $100–250. Abdominal ultrasound and liver aspirate cost $400–800 combined. Esophagostomy tube placement is typically $500–1,000. Hospitalization for the first 3 to 5 days runs $500–1,500 per day. Total cost commonly lands between $3,000 and $7,000, with home tube feeding adding $200–400 per month in food and supplies. Catching anorexia early — before jaundice develops — dramatically cuts the bill.
Can a cat recover from hepatic lipidosis without a feeding tube?
Recovery without a feeding tube is uncommon and far less likely. Published studies report survival rates of 80 to 90 percent with tube feeding but well under 50 percent with syringe feeding alone. Force-feeding by mouth often builds food aversion that makes recovery harder. Most internal-medicine specialists consider the feeding tube the single most important treatment decision.
Will my cat have a feeding tube forever?
No. The tube is temporary — most cats keep it for two to six weeks until their own appetite returns reliably. Cats can drink water, eat treats, and groom normally with an E-tube in place; many owners say their cat barely notices it after the first day. The tube comes out at home or in a brief vet visit once the cat is eating enough on its own.
What underlying diseases trigger hepatic lipidosis?
Roughly half of cases have an identifiable trigger. Pancreatitis is the most common, followed by inflammatory bowel disease, cholangitis, diabetes mellitus, hyperthyroidism, neoplasia (especially lymphoma), and kidney disease. Diagnosing and treating the underlying problem at the same time as the lipidosis is essential — otherwise the cat will relapse once the tube comes out.
How long does recovery from fatty liver take?
With early diagnosis and proper tube feeding, most cats are eating voluntarily again within two to four weeks and have the tube removed by week six. Liver enzymes can take two to three months to fully normalize. Energy and weight typically return to normal by three to four months. Cats that recover usually do not get hepatic lipidosis again, especially if weight is kept in check.
Can a healthy-weight cat get hepatic lipidosis?
Yes, though it is less common. Lean cats can develop hepatic lipidosis after prolonged anorexia (five to seven plus days) due to severe underlying illness. The risk and severity scale with body fat, but any cat that goes more than three days without eating should be evaluated. Body condition is a risk factor, not a prerequisite.
Still Not Sure if Your Cat Needs a Vet?
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