How long can a cat go without eating?

Cats should not skip more than 24 hours without food. After two to three days, hepatic lipidosis (fatty liver disease) becomes a serious risk — especially in overweight cats.

Why has my cat stopped eating?

Dental pain, illness, stress, recent vaccination, diet changes, and nausea from kidney or liver disease are common causes. Any cat that stops eating needs veterinary evaluation, not a wait-and-see approach.

Should I force-feed my cat?

Do not force food into a reluctant cat — it increases stress and aspiration risk. Offer warmed, aromatic food and contact your vet if appetite does not return within 24 hours.

Can stress cause a cat to stop eating?

Yes. Moving house, new pets, changes in routine, or conflict with other cats can suppress appetite. Rule out illness first — stressed cats still need a vet exam if not eating.

When is loss of appetite an emergency?

Seek same-day care if your cat has not eaten for 24 hours, is vomiting, lethargic, or breathing fast. Overweight cats are at highest fatty liver risk.

Cat Health

Cat Not Eating? Causes and When to Call a Vet

By Kaiser Khan, EditorPublished 24 June 2026Last updated 25 September 20263 min read

Quick answer

When a cat stops eating, take it seriously. Unlike dogs, cats who go more than 24 hours without food — especially overweight cats — risk hepatic lipidosis (fatty liver disease), which can be fatal. Contact your vet promptly if your cat refuses food, eats significantly less, or shows lethargy or vomiting alongside appetite loss. Out of hours with collapse or severe illness, find an out-of-hours vet.

Key takeaways

Cats should not go more than 24 hours without food — hepatic lipidosis (fatty liver) is a real risk, especially in overweight cats.
Appetite loss can mean dental pain, kidney disease, stress, or nausea — do not wait-and-see beyond a day.
Contact your vet promptly if your cat refuses food; out of hours with collapse or severe illness, phone the nearest out-of-hours vet.

A wider perspective: the dog and cat rescue appeal from the non-profit World Animal Rescue Network.

Why appetite loss is urgent in cats

Cats are obligate carnivores with unique metabolism. When they stop eating, their bodies mobilise fat stores to the liver faster than the liver can process them. Fat accumulates in liver cells, causing hepatic lipidosis — a potentially life-threatening condition.

Overweight cats are at highest risk, but any cat that stops eating for more than two to three days can develop fatty liver disease. Treat >24 hours without food as the point to phone your vet — do not wait for day three.

Common reasons cats stop eating

Illness and pain

Dental disease — sore teeth and gums make chewing painful
Kidney disease, hyperthyroidism, diabetes — common in older cats
Upper respiratory infections — blocked nose reduces interest in food
Gastrointestinal disease — pancreatitis, inflammatory bowel disease
Cancer and organ failure

Environmental and behavioural factors

Stress — new home, new pet, construction, change in routine
Food aversion — after nausea from illness or medication
Diet change — cats often reject new food abruptly introduced
Competition — another cat blocking access to the bowl
Dirty bowls or wrong location — some cats refuse food near litter boxes

Recent medical events

Post-surgical recovery
Vaccination — mild temporary appetite reduction
Medication side effects

Warning signs beyond not eating

Contact your vet urgently if your cat also has:

Vomiting or diarrhoea
Lethargy or hiding
Weight loss or jaundice (yellow gums or skin)
Difficulty breathing or nasal discharge
Known chronic illness such as kidney disease

What you can try at home (briefly)

For a cat skipping one meal who otherwise seems well:

Offer warm, aromatic food — warmed wet food releases stronger scent
Try a strong-smelling topper — tuna juice (not oil), chicken broth without onion or garlic
Ensure a quiet feeding area away from stressors and litter boxes
Offer multiple small portions rather than one large bowl

If appetite does not return within 24 hours, schedule a vet appointment — do not wait longer.

Veterinary evaluation and treatment

Your vet will examine for dental pain, abdominal masses, fever, and dehydration. Bloodwork, urinalysis, and imaging identify underlying disease. Treatment of the primary cause — plus appetite stimulants, anti-nausea drugs, or temporary feeding tubes in severe cases — restores nutrition before fatty liver develops.

Early intervention dramatically improves outcomes.

Sources & further reading

This guide draws on the publicly available UK advice listed below. Follow the links for the relevant guidance or the organisation's broader care resources.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Editorial sources and further reading (last updated 2026-09-25).

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Frequently Asked Questions

How long can a cat go without eating?: Cats should not skip more than 24 hours without food. After two to three days, hepatic lipidosis (fatty liver disease) becomes a serious risk — especially in overweight cats.
Why has my cat stopped eating?: Dental pain, illness, stress, recent vaccination, diet changes, and nausea from kidney or liver disease are common causes. Any cat that stops eating needs veterinary evaluation, not a wait-and-see approach.
Should I force-feed my cat?: Do not force food into a reluctant cat — it increases stress and aspiration risk. Offer warmed, aromatic food and contact your vet if appetite does not return within 24 hours.
Can stress cause a cat to stop eating?: Yes. Moving house, new pets, changes in routine, or conflict with other cats can suppress appetite. Rule out illness first — stressed cats still need a vet exam if not eating.
When is loss of appetite an emergency?: Seek same-day care if your cat has not eaten for 24 hours, is vomiting, lethargic, or breathing fast. Overweight cats are at highest fatty liver risk.