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.

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.

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

Why Is My Cat Not Eating UK?

Published 19 July 2026Last updated 19 July 20262 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). Contact your vet promptly. Do not wait and see. Use our symptom checker for triage guidance.

Key takeaways

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.
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.
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.

Why the 24-hour rule matters

Cats who stop eating trigger rapid fat mobilisation to the liver. Overweight cats are at highest risk of hepatic lipidosis — a potentially fatal condition that develops within days.

This is why cat appetite loss is treated more urgently than in dogs.

Common causes

Dental disease — broken teeth, gum infection, oral pain
Kidney disease, hyperthyroidism, or diabetes — common in UK cats over eight
Stress — moving house, new pets, conflict with other cats
Nausea from illness or recent medication
Diet change — sudden food switches can suppress appetite

What you can try at home

Offer warm, aromatic wet food in a quiet area
Try a different texture — pâté, gravy, or jelly varieties
Warm food slightly to release aroma (not hot)
Ensure fresh water is available

Do not force-feed or give human medications.

When to call your vet

Contact your vet today if:

No food for 24 hours
Eating significantly less for several days
Vomiting or lethargy alongside appetite loss
Known access to toxins or plants

Out of hours with collapse or severe illness: find your nearest out-of-hours vet or use find a vet.

Sources & further reading

Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-07-19).

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.
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.
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.