general information compiled from published veterinary guidance. This is not veterinary advice and cannot diagnose your animal. Sponsored links earn a commission at no extra cost to you.
Cat not eating: how long is safe?
A cat that stops eating is a more serious situation than most owners realise. The clock matters.
How this was built: general information compiled from published veterinary guidance. This is not veterinary advice and cannot diagnose your animal. Sponsored links earn a commission at no extra cost to you.
The short rule: a cat that has eaten nothing for 24 hours needs a vet call. At 48 hours it needs to be seen. Cats are not small dogs — prolonged fasting can cause hepatic lipidosis (fatty liver), which is serious and expensive to treat.
Why cats are different
When a cat stops eating, fat is mobilised to the liver faster than the liver can process it. The result is fatty liver disease, which suppresses appetite further — a vicious cycle that can become life-threatening within days, particularly in overweight cats.
The usual causes
| Cause | Clue |
|---|---|
| Dental pain | Dropping food, chewing on one side, bad breath |
| Nausea or GI disease | Vomiting, lip licking, drooling |
| Stress or change | New pet, move, new food, visitors |
| Upper respiratory infection | Sneezing, discharge — cats stop eating because they can't smell |
| Kidney or thyroid disease | Older cat, weight loss, increased drinking |
| Foreign body or blockage | Sudden onset, vomiting, pain |
Safe ways to tempt appetite — for a cat that is otherwise well
- Warm the food to body temperature. Smell drives feline appetite.
- Offer strong-smelling wet food, or a small amount of plain cooked chicken.
- Reduce stress: quiet room, food away from the litter box and away from other pets.
- Try a shallow wide bowl — whisker fatigue is real for some cats.
- Never force-feed. It risks aspiration and makes food aversions worse.
If a cat refuses even highly palatable food for a full day, that is diagnostic information, not a reason to keep trying different flavours.
What to tell the vet
How many hours since it last ate, whether it is drinking, litter box output, vomiting, weight change, and any recent changes at home. A cat that is eating nothing and not drinking is more urgent than one still drinking.
Questions people ask
How long can a cat go without eating?
Treat 24 hours with no food as a reason to call a vet, and 48 hours as a reason to be seen. Prolonged fasting can cause fatty liver disease.
Why is a cat not eating more serious than a dog?
Cats mobilise fat to the liver quickly when fasting, which can cause hepatic lipidosis. Dogs tolerate short fasts better.
How do I get my cat to eat?
Warm the food, offer strong-smelling wet food, reduce stress, and use a shallow bowl. Never force-feed — it risks aspiration.
My cat is eating but losing weight — is that ok?
No. Weight loss with a normal appetite warrants bloodwork — thyroid disease, diabetes and intestinal disease all present this way.