My Cat Stopped Eating: When to Worry and What to Do
Cat not eating? Learn the 24-hour rule, the fatty liver risk, a triage table for emergency vs same-day care, common causes, US/UK vet costs, and safe tips.
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The short answer: An adult cat that has eaten nothing for 24 hours should be seen by a vet, and you should call sooner if your cat is a kitten or also vomiting, hiding, breathing oddly or straining in the litter box. Cats are not like dogs. A few days without food can set off hepatic lipidosis (fatty liver disease), which can kill a cat if it is not treated quickly. A skipped meal is not an emergency. A full day of not eating is a reason to call the vet.
This is general information, not veterinary advice. If your cat seems unwell, contact your vet or an emergency clinic.
How long can a cat go without eating?
It helps to separate two questions: how long a cat could survive, and how long it is safe to wait. Most "how long" articles blur them. The second one is what matters.
- Adult cats: The Cornell Feline Health Center says loss of appetite can severely affect a mature cat's health if it lasts for as little as 24 hours. That is why 24 hours is the usual limit for calling your vet.
- Kittens: Cornell warns that in a kitten younger than six weeks, going without food for just 12 hours can be life-threatening. Treat a young kitten that will not eat as same-day urgent at the very least. Our guide to caring for a 1-month-old kitten covers normal feeding schedules.
- Two days or more: VCA Animal Hospitals advises that if your cat has refused food for more than two days, you should consult your veterinarian immediately. By then, the risk of liver damage is real.
"Not eating" also includes eating much less than normal. A cat that nibbles a few kibbles and walks away is taking in very little food, and the liver risk can build up the same way.
Why waiting is risky: hepatic lipidosis
When a cat stops eating, its body breaks down stored fat for energy. Cats handle this poorly. The fat floods the liver faster than the liver can process it, and liver cells fill with fat. This is hepatic lipidosis.
- VCA notes that cats with hepatic lipidosis have usually gone through a period of little or no eating for three to four consecutive days, and the risk is higher if the cat was overweight beforehand.
- Cornell describes it as a common diagnosis that can be fatal if it is not reversed promptly. It also notes that the condition can affect cats that look normal and healthy, not only overweight ones.
- VCA and Cornell both report that in more than 90% of cases, an underlying illness caused the cat to stop eating in the first place. So fatty liver is usually a second problem stacked on top of the first.
- The University of Illinois College of Veterinary Medicine says the most important thing to watch for is a cat not eating for several days in a row. It adds that earlier tube feeding of cats that won't eat has probably made the disease less common.
The practical lesson is to act on day one, not day four. Treatment for established fatty liver often means a feeding tube. VCA says the average cat needs six to seven weeks of tube feeding before it eats on its own again. A visit when the problem starts is far easier on everyone.
Triage: emergency now, same day, or watch closely
Use this table to decide how fast to act. If you're unsure which row fits, choose the more urgent one.
| Situation | What to do |
|---|---|
| Not eating plus labored or open-mouth breathing, collapse, repeated vomiting, pale or yellow gums, a swollen or painful belly, or suspected poisoning (lilies, human medicines, antifreeze) | Emergency now. Go to your vet or the nearest emergency clinic. |
| A male cat not eating and straining in the litter box or passing little or no urine | Emergency now. A blocked bladder can be fatal within hours. |
| A kitten not eating, or not drinking | Same day, sooner if it is weak. Kittens run out of reserves fast. |
| An adult cat with no food for 24 hours, or very little food for a day or two | Same day. Call your vet for an appointment. |
| Not eating and also hiding, drooling, pawing at the mouth, losing weight, or a senior cat with any change in appetite | Same day. These point to pain or illness. |
| Skipped one meal but is bright, drinking, using the litter box normally, and there is an obvious cause (new food, a move, visitors) | Watch closely. Record what goes in and comes out. Call if no real meal by the 24-hour mark. |
Cats are very good at hiding illness, so loss of appetite is often the first sign you'll see. Our guide to signs a cat is hiding sickness lists the quieter clues to look for.
Common reasons a cat stops eating
Medical causes
- Dental pain: gum disease, resorptive lesions or a broken tooth. Watch for chewing on one side, dropping food or drooling.
- Nausea and digestive disease: gastritis, inflammatory bowel disease, constipation, a swallowed object or hairball problems.
- Kidney disease, hyperthyroidism, diabetes and liver disease: these are especially common in older cats. See senior cat changes and what to expect.
- Upper respiratory infections: a blocked nose means a cat can't smell food, and cats rely heavily on smell to want to eat.
- Pain elsewhere, such as arthritis, injury or pancreatitis, as well as fever, infection and cancer.
- Urinary problems, including the life-threatening urethral blockage in male cats.
Environmental and behavioral causes
- A sudden food change, a stale or spoiled bowl, or a bowl moved to a new spot.
- Stress from a move, building work, a new pet or baby, or competition with another cat at mealtimes. See feeding multiple cats without food wars.
- Food placed too close to the litter box or to strong smells such as cleaners or air fresheners. Our post on litter box mistakes covers good placement.
- Recent vaccination, travel or boarding. These usually cause a short dip in appetite, not a full day without food.
An environmental cause is a reasonable guess only if your cat is otherwise completely normal. It does not change the 24-hour rule. Many illnesses look like "just stress" at first.
What the vet will do
Expect the vet to look for the reason your cat stopped eating and to get food into your cat at the same time. A typical visit includes:
- History and exam: weight compared with previous visits, temperature, hydration, a look inside the mouth, feeling the belly, and checking the bladder. It helps to bring notes on when your cat last ate, what it ate, and any vomiting, diarrhea or changes in urine.
- Tests: VCA lists a complete blood count, a serum chemistry profile, electrolytes, chest and abdominal X-rays and ultrasound as common tests, with endoscopy or biopsy only if needed. A urine test and a thyroid test are common in older cats.
- Supportive care: fluids for dehydration, anti-nausea medicine, and pain relief if needed.
- Appetite support: VCA notes vets may prescribe a short course of a cat-appropriate appetite stimulant such as mirtazapine or cyproheptadine. Cornell notes mirtazapine also helps relieve nausea. If the cat still won't eat, a feeding tube may be recommended. VCA describes tubes as usually easy to place and care for, and lifesaving even when needed for only a few days.
What it typically costs
Prices vary widely by location and by type of practice. Treat these as rough guides, not quotes:
| Item | US (USD) | UK (GBP) |
|---|---|---|
| Standard consultation / exam | About $57–$130 for a routine cat visit (CareCredit national average range) | About £44–£81, averaging around £62 (ManyPets UK survey) |
| Blood tests | About $144–$164 for a chemistry panel (CareCredit average figures) | From around £100 for in-house tests, more if sent to an outside lab (ManyPets) |
| Urgent or out-of-hours visit | Higher than routine visits. Emergency-clinic hospitalization averages about $1,144 for cats (CareCredit) | About £150–£300 extra for an urgent appointment in hours; at least £200–£300 out of hours before treatment (ManyPets) |
Prompt care for a cat that won't eat usually means a consultation plus bloodwork. Weeks of hospital care and tube feeding for advanced fatty liver cost far more. If cost is a worry, ask for an estimate up front. Our guide to choosing the right vet includes questions about fees and payment options.
Safe ways to tempt a cat to eat
These are for a cat that is otherwise well and waiting for a vet appointment. They do not replace one.
- Warm wet food to roughly body temperature, about 100°F (38°C). Stir it and check for hot spots. Warm food smells stronger, which helps congested cats.
- Offer small, fresh portions in a shallow, wide dish. Remove uneaten wet food after about 30 minutes.
- Use a quiet spot away from the litter box, other pets and strong smells. Some cats eat better with gentle company and others need to be left alone.
- Try a different texture, such as pâté, shreds or chunks, or a small amount of plain cooked chicken with no seasoning, onion or garlic.
- Don't switch foods suddenly if your cat has a sensitive stomach. See cat food for sensitive stomachs and how to choose wet cat food.
- Don't force-feed by syringe unless your vet shows you how. It can cause choking and food aversion.
Never give human appetite stimulants, antidepressants, antacids or painkillers. Doses made for people can be dangerous for cats, and some common painkillers, such as acetaminophen (paracetamol), are toxic to them. Appetite drugs for cats should come only from your vet, who will check first for kidney, liver or thyroid problems.
Frequently asked questions
Is it normal for a cat not to eat for a day?
No. A skipped meal can happen, but a full 24 hours with no food is not normal for an adult cat. Cornell says it can severely affect a cat's health. Call your vet that day.
My cat is drinking water but not eating. Is that less serious?
Drinking helps prevent dehydration, but it does not protect the liver. Hepatic lipidosis is caused by not taking in enough food, so the 24-hour rule still applies. Some illnesses, such as kidney disease and diabetes, actually make cats drink more.
Can I wait until Monday if my cat stops eating over the weekend?
If your cat has gone 24 hours without food, or shows any sign in the emergency row of the table above, call an emergency clinic rather than waiting. Many practices will give phone advice and tell you whether your cat needs to be seen now.
Can stress alone make a cat stop eating?
Yes. Moves, new pets and changes in routine can reduce appetite. But stress can't be told apart from illness at home, and a stressed cat that goes days without eating still risks fatty liver. Keep your cat active and settled with routine play, and see our ideas for indoor cat exercise in small spaces.
Sources
- Cornell Feline Health Center, Anorexia
- Cornell Feline Health Center, Hepatic Lipidosis
- VCA Animal Hospitals, Hepatic Lipidosis in Cats (Fatty Liver Syndrome in Cats)
- VCA Animal Hospitals, Anorexia in Cats
- University of Illinois College of Veterinary Medicine, Hepatic Lipidosis If Cats Don't Eat
- CareCredit, Veterinary Exam and Procedure Costs
- ManyPets UK, How much is a vet visit in the UK?
