health
Hepatic lipidosis (fatty liver)
Why a few missed meals is dangerous
When a cat stops eating, the body breaks down fat stores for energy and routes them through the liver. Cats are obligate carnivores with limited capacity to handle that volume of fat, so it accumulates inside liver cells rather than passing through. The engorged cells stop working, and liver function fails.
The cruelty of it is the feedback loop: liver failure causes nausea, nausea suppresses appetite further, and the cat eats even less. The more body fat a cat had at the start, the more fuel there is for the process, so obesity is the main risk factor.
In the large majority of cases the loss of appetite is itself a symptom of something else, such as pancreatitis, inflammatory bowel disease, dental pain, another liver disease, or stress from a house move. Treating the lipidosis without finding that cause solves half the problem.
What to watch for
- Any cat not eating for 48 hours needs a vet call, and an overweight cat sooner. This is the single number worth remembering.
- Rapid weight loss, particularly when it is obvious over a week or two.
- Yellowing of the gums, the whites of the eyes, or the skin inside the ears.
- Drooling, vomiting, and hiding.
- Weakness, and a head-down, hunched posture.
Multi-cat households hide the early signs, because nobody notices which cat is not visiting the bowl. If one cat is off-colour, feeding separately for a day is the fastest way to find out who is eating.
How it is treated
Treatment is aggressive nutritional support until the liver recovers, usually delivered through a feeding tube because the cat is too nauseated to eat voluntarily. Owners often resist the tube; it is generally well tolerated, and it is the intervention that works. Recovery commonly takes six to seven weeks of consistent feeding.
The prognosis with early, committed treatment is good. Untreated, it is frequently fatal. Nothing about home care substitutes for veterinary management here.
Why it matters
Most owners treat a cat skipping a meal as fussiness, and for a lean cat over one day that is often true. For a heavy cat over several days it is the start of a life-threatening illness, and the window in which it is easy to reverse is short. This is also the strongest practical argument against crash dieting an obese cat: weight loss in cats has to be gradual and vet-supervised, because the same fat mobilisation that makes a cat thinner is what damages the liver when it happens too fast.
Frequently asked questions
- How fast can I safely slim down an overweight cat?
- Slowly, and with veterinary supervision. Aggressive calorie restriction in cats risks triggering the exact disease you are trying to prevent, so a structured plan with regular weigh-ins is the safe route.
- My cat stopped eating after we moved house. Is that enough to cause it?
- Yes. Stress-related appetite loss is a documented trigger. A cat who has not eaten for two days after a move needs a vet, not more time to settle in.
- Will appetite stimulants avoid the feeding tube?
- Sometimes, in mild and early cases. They are not reliable enough to bet on once a cat is jaundiced, and delaying assisted feeding to try them is how mild cases become severe.