Cat Loss of Appetite: When to Worry & What to Do

EMERGENCY

Go to an emergency vet now — Please contact an emergency vet or poison line now — do not wait to observe.

What it can look like

Cats should not go long without eating. A cat that refuses food for more than 24 hours — or stops eating suddenly — should see a vet promptly.

Common triggers to consider

Stress, a new home or a dirty litter area
Dental disease or a painful mouth
Nausea, parasites or illness
A change in food they do not like

When to call your vet

Contact your vet if any of these apply:

Not eating for more than 24 hours
Sudden loss of appetite with vomiting or lethargy
Hiding, drooling, or weight loss

What to do right now

Offer a small portion of their usual food, slightly warmed. Clean bowls and try a quiet spot. If your cat still will not eat today, call your vet.

What the vet may do

Because cats can develop serious liver issues after even a short fast, your vet may run blood work and provide nutritional support.

Common questions

How long can a cat go without eating?

More than 24 hours without food is a serious warning sign in cats — a short fast can contribute to liver problems. Contact your vet the same day.

My dog is eating less but seems fine — should I worry?

Try offering a small bland meal and monitor for a day. If appetite does not return within 24 hours, or your dog develops vomiting, diarrhea or low energy, call your vet.

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Same symptom in Dog: see Dog Loss of Appetite — causes and home care can differ by species.

This page is educational triage information, not a diagnosis. Pets vary — when in doubt, ask your vet. In an emergency, contact your local emergency clinic or pet poison hotline directly.