How long can a cat go without eating?

Written by N | July 24, 2025

There’s a short answer to that: A cat can’t go without food! In this blog, we’ll explain why.

A cat cannot fast

A cat needs to eat every 24–48 hours. When a cat doesn’t eat, it becomes nauseous. Cats have a high metabolism and require a lot of energy from food. If a cat doesn’t get this energy, the body starts to compensate. This usually happens by mobilizing fat stores, which greatly increases the risk of fatty liver disease (hepatic lipidosis). As fat accumulates in the liver, the cat becomes (even more) nauseous. This reduces the appetite further and creates a negative spiral that is hard to break.

A cat that refuses to eat is considered an emergency by veterinarians!

Why doesn't a cat want to eat?

There are many reasons why a cat might refuse food. The most common causes include:

Your cat doesn’t like the food
Your cat feels nauseous due to illness
Your cat has a fever
Your cat has a sore throat
Your cat has dental pain

What should I do if my cat doesn’t eat?

If your cat refuses food but is otherwise playful and lively, you can try offering different food.

A nauseous cat may still show interest in food. However, an aversion to their usual kibble can develop. For example, your cat might run to the bowl when it’s placed down, sniff the food, but then walk away without eating. As an owner, this may seem like your cat wants to eat but can’t. Often, this is not the case. Offering a different type of food may encourage your cat to eat again.

This situation should not last longer than 48 hours. If your cat still doesn’t eat after that, you must contact your veterinarian for a check-up and supportive care.

Is your cat sick? Is it vomiting, drooling, grinding its teeth, or showing other unusual behavior? Then it’s time to visit the vet! The sooner your cat gets help to start eating again, the faster it will recover.

What does a vet do for a cat that won’t eat?

Your vet will start by performing a physical exam and, if needed, additional diagnostics to find the cause of your cat’s reduced appetite.

Treatment depends on the underlying cause. Often, the cat will receive an anti-nausea injection, and sometimes an appetite stimulant is given.

If needed, your vet will assist with feeding. This may involve giving special recovery food using a feeding syringe directly into the mouth. Another option is placing a nasal or esophageal feeding tube. Although a feeding tube may sound invasive, it is often easier for cat owners and less stressful for the cat.

Still have questions about a cat that won’t eat? Feel free to contact us at veterinarian@vetsend.co.uk