Cat Not Eating for 2 Days: Causes, the Fatty Liver Risk & What to Do
A cat that hasn't eaten for 2 days needs to see a vet today. Cats can't safely go without food: their bodies break down fat quickly, which can lead to a serious liver condition called hepatic lipidosis. Go sooner for kittens, seniors, overweight cats, or if there's vomiting, jaundice or lethargy.
Your cat skipped breakfast, then dinner, then all of yesterday. Now it's day two and the bowl is still untouched. Two days without food is a genuine warning sign in cats, both because of what it does to the liver and because something is usually causing it. This guide explains the risks, the warning signs, safe ways to tempt your cat to eat, and when to stop trying at home.
How Long Is Too Long Without Food?
Unlike dogs or people, cats can't safely fast. This is one of the most important facts about cat health, and many owners don't learn it until they're in the middle of a problem.
A practical guide for healthy adult cats:
Missed a meal or two: Monitor closely and try the tips below. Stress, a food change or a mild stomach upset are common reasons.
24 hours without eating: Call your vet for advice, especially if your cat is overweight, older or has any health condition.
48 hours without eating: See a vet the same day.
Any time, with other symptoms such as vomiting, jaundice or severe lethargy: go to a vet or emergency clinic now.
These timelines are shorter for kittens, senior cats, overweight cats and cats with existing health problems. For those cats, missing more than a meal or two is worth a same-day call to your vet.
Key Takeaway
Two days without food is a vet visit today. The risk of fatty liver disease rises with every day a cat doesn't eat, and the reason your cat stopped eating also needs to be found.
The Fatty Liver Risk: Hepatic Lipidosis Explained
Understanding this condition explains why cats can't be left to "eat when they're hungry enough."
When a cat stops eating, the body starts breaking down stored fat for energy. Fatty acids travel to the liver to be processed. In cats, the liver can be overwhelmed: when more fat arrives than the liver can burn or package up and send back out, fat builds up inside the liver cells.[1]
As the liver cells fill with fat, they stop working properly. Bile can back up into the bloodstream, causing jaundice: a yellow tinge to the skin, gums and whites of the eyes. The liver struggles with its basic jobs, such as clearing toxins, controlling blood sugar and making clotting proteins. Without treatment, this becomes liver failure.
This is hepatic lipidosis, also called fatty liver disease. It is one of the most common liver diseases in cats.[1][2]
The danger is that it isn't obvious at first. Your cat may look fine, walking around and maybe drinking a little water, with no vomiting or obvious pain. It's easy to wait another day, which is exactly why a firm timeline matters.
Overweight cats are at much higher risk. More body fat means more fat can be sent to the liver once eating stops. If your cat is carrying extra weight and has stopped eating, don't wait. Call your vet sooner rather than later.
Vitamin B12 and recovery
Vets often check vitamin B12 (cobalamin) levels in cats with fatty liver disease, because low levels are common in sick cats with liver or gut problems, and B12 plays a role in how the body handles fat. If levels are low, supplementing is a routine part of treatment.
How hepatic lipidosis develops
Key Takeaway
Fatty liver disease develops when a cat stops eating and the liver can't keep up with the fat being sent to it. Overweight cats are at highest risk. Most cats recover when treated early with intensive nutritional support, so don't wait.
Why Cats Stop Eating: Common Causes
Appetite loss in cats has medical causes and behavioral or environmental causes. Both need to be on your radar.
Category
Cause
Other signs to watch
Medical
Dental pain, tooth resorption or mouth inflammation
Pawing at the mouth, drooling, bad breath
Nausea (from many illnesses)
Lip licking, excessive swallowing, lethargy
Pancreatitis
Belly pain, vomiting, hunched posture
Chronic kidney disease
Increased thirst, weight loss, poor coat
Upper respiratory infection
Sneezing, nasal discharge, congestion
Inflammatory bowel disease
Intermittent vomiting, weight loss, diarrhea
Behavioral / environmental
Stress or anxiety (new pet, move, schedule change)
Hiding, reduced grooming, litter box changes
Food preference or texture dislike
Sniffs the food and walks away; eats treats but not meals
Cold or stale food
Eats from a fresh can, refuses food left out
Dirty food bowl
Refuses own bowl; tries to eat from surfaces nearby
Competition in a multi-cat home
One cat consistently eating less; gradual weight loss
Upper respiratory infections are easy to overlook. Cats rely heavily on smell to recognize food, so a blocked nose can make food seem unappealing. If your cat has been sneezing or has nasal discharge along with appetite loss, this may be part of the problem.
Dental disease is also common and often missed. Cats hide pain well, and a cat with painful teeth or gums may eat normally until it suddenly can't. Look for red gums along the teeth, drooling or pawing at the face.
Hyperthyroidism, which is common in older cats, usually causes an increased appetite with weight loss, but some cats eat less. A blood test checks for it.
If you're not sure what's behind your cat's appetite loss, you can run their symptoms through our free cat symptom checker, which flags warning signs that need a vet first. If your cat hasn't eaten for 2 days, book a vet visit today as well.
Symptoms That Mean Go to the Vet Now
Not eating for 2 days is already a reason to see a vet today. Add any of these symptoms and it becomes an emergency.
🚨 Seek Emergency Veterinary Care If Your Cat Has:
Yellowing of the skin, gums or whites of the eyes (jaundice)
Vomiting along with food refusal
Extreme lethargy: unable to hold the head up, or unresponsive
Excessive drooling or an unusual smell to the breath
Refusal of water as well as food
Rapid weight loss or visible muscle wasting
Seizures, wobbling or disorientation
Difficulty breathing, or a male cat straining in the litter box
Jaundice is easy to miss because it can be subtle. In good light, check the skin inside the ear flap, the gums and the whites of the eyes. A yellow tinge that wasn't there before is a red flag that the liver is struggling.
Key Takeaway
Jaundice plus food refusal means don't wait: the liver may already be affected, and every hour of delay matters.
Not Sure How Urgent Your Cat's Situation Is?
Our free AI symptom checker flags warning signs that need a vet first, then helps you understand possible causes and natural next steps to discuss with your vet.
These tips are for a cat that has only missed a meal or two, has no emergency symptoms and is otherwise behaving normally. If your cat has already gone 2 days without food, try them while you arrange a vet visit, not instead of one.
Warm the food
Cats choose food largely by smell. Warming wet food to around body temperature (about 100°F / 38°C) releases more aroma. A few seconds in the microwave is enough: stir well and check there are no hot spots before serving.
Tempting additions
Tuna water or low-sodium fish broth: a spoonful over the regular food adds strong scent.
Warm chicken broth with no onion or garlic, and low in sodium: adds scent and fluid.
A different texture: if your cat usually eats pâté, try shreds or chunks, or the reverse.
Something new and aromatic: a little plain cooked chicken, sardines in water (rinsed), or a small amount of kitten food, which is richer.
Change the setting
Move the food to a quieter spot, away from the litter box, noisy appliances and other pets.
Try a flat plate or a wide, shallow dish.
Feed where your cat can see the room around them and feels secure.
Some cats seem to dislike their whiskers brushing the sides of deep, narrow bowls, often called "whisker fatigue." Evidence is limited, but a wide, shallow dish costs nothing to try, and some owners find it helps.
Try offering a few small pieces of warmed food from your fingers. For anxious cats, your calm presence at mealtime can help, especially if the appetite loss started around a change in the household.
Set a firm limit
If your cat has eaten nothing at all within 24 hours of you first noticing, call your vet, even if you still have ideas to try. If it has reached 2 days, see a vet today. The liver risk doesn't wait while you try one more food.
Key Takeaway
Warming food, changing texture and adding tempting liquids can help a cat that has only missed a meal or two. But set a firm 24-hour limit, and never let home strategies delay a vet visit once your cat reaches 2 days without food.
What Not to Do When Your Cat Won't Eat
Don't force-feed by syringe unless your vet shows you how. A nauseous cat can inhale food into the lungs, and forcing food can create a lasting dislike of it.
Don't switch foods constantly. Offer one thing, give it 20–30 minutes, remove it if uneaten, and try again at the next mealtime.
Don't give human medications, supplements or essential oils. Ibuprofen, acetaminophen (Tylenol/paracetamol) and aspirin are dangerous to cats. Many essential oils, including tea tree, eucalyptus and pennyroyal, are toxic to cats.
Don't wait for them to "eat when they're hungry enough." That approach can work for dogs but is dangerous for cats, because fatty liver disease can develop first.
Never use essential oils on or around a cat as an appetite stimulant. Cats' livers lack some of the pathways other animals use to break down many plant compounds, so oils that seem harmless to people can be toxic to cats.
Special Considerations: Senior Cats and Kittens
Senior cats (10+ years)
Older cats have less reserve to cope with not eating, and they are more likely to have an underlying condition behind the appetite loss, such as kidney disease, hyperthyroidism, dental disease or cancer. A senior cat that hasn't eaten for 24 hours should prompt a same-day call to your vet.
Kittens (under 6 months)
Kittens have tiny energy reserves and can develop low blood sugar quickly when they don't eat, which can cause weakness, collapse or seizures. Contact your vet promptly if a kitten skips meals, and treat a young kitten that won't eat as urgent.
Key Takeaway
The timeline is much shorter for seniors and kittens. An older cat not eating needs a same-day vet call, and a kitten not eating is urgent within hours.
Stress, Environment and Appetite Loss
Stress is a common and often underestimated cause of appetite loss in cats. Cats are territorial animals that rely heavily on a familiar, secure environment, so changes at home can affect them more than owners expect.[5][6] Stress-related appetite loss often starts around the same time as a change in the household.
Common stress triggers:
A new baby, partner or pet in the home
Moving house or rearranging furniture
Changes in feeding times or the owner's schedule
A sudden switch to a new food
Another cat guarding or blocking the food bowl
Construction, loud noise or renovations
A recent vet visit or boarding stay
If stress seems to be the trigger, focus on making mealtimes feel safe: a quiet, private feeding spot, a predictable routine, and separate bowls for each cat. Pheromone diffusers such as Feliway Classic are low-risk and some owners find them helpful, although scientific evidence for them is limited.[7] Use them alongside changes to the environment, not instead of them.
A practical tip: cats that stop eating after a new pet arrives often eat again when fed in a separate room with the door closed, away from the sight and smell of the newcomer. If stress-related appetite loss doesn't improve quickly, still follow the 24-hour and 48-hour vet guidelines above.
What Veterinary Treatment Involves
Knowing what to expect can help you make decisions quickly. Depending on what your vet finds, treatment may include:
Examination and bloodwork Your vet checks hydration and looks for jaundice, and runs blood tests including liver values, bilirubin and blood sugar to look for causes.
Abdominal ultrasound This can show changes typical of fatty liver, and helps check for pancreatitis, masses or intestinal problems.
Fluids and hospitalization Many cats that haven't eaten are dehydrated and need fluids to correct electrolytes and support recovery.
Feeding tube For fatty liver disease, getting enough food into the cat is the core of treatment.[3] A small feeding tube, often placed in the neck under brief anesthesia, lets you give full meals at home without stressful syringe feeding.
Vitamin B12 and other support Low B12 is supplemented if found, along with anti-nausea medication and treatment for the underlying cause.
Ongoing nutritional support Tube feeding often continues for several weeks while the liver recovers. With early, intensive treatment, most cats recover.[1][2]
Key Takeaway
Treatment for fatty liver disease is intensive but often successful when started early. A feeding tube sounds alarming, but most cats tolerate it well, and it can be managed at home.
Long-Term Prevention and Appetite Monitoring
Know your cat's normal
If you free-feed dry food and top up the bowl, it's hard to tell whether your cat ate less yesterday. Scheduled meals, even twice a day, give you a daily signal of appetite. A cat that doesn't come for a scheduled meal is telling you something, and catching it early gives you more options.
Weigh your cat regularly
Weighing your cat every couple of weeks catches gradual weight loss that daily observation misses. Weigh yourself holding your cat, then subtract your own weight, or use a baby or pet scale. Unexplained weight loss is worth a vet visit, even if appetite seems normal.
Holistic appetite support
Offer some variety. Cats fed one food only can be harder to tempt if that food changes or runs out. Introducing a few different proteins and textures over time, gradually, keeps options open.
Look after dental health. Regular dental checks, and tooth brushing or dental chews where your cat accepts them, help prevent mouth pain from becoming a reason not to eat.
Manage weight carefully. A lean cat has a lower risk of fatty liver disease. If your cat needs to lose weight, do it gradually with your vet. Sudden, strict dieting in an overweight cat is itself a known trigger for fatty liver.
Add a quick daily "food check" to your routine: at the same time each day, note how much your cat has eaten. It takes seconds and gives you an early warning system for appetite changes.
Key Takeaway
Scheduled meals, regular weight checks, good dental care and gradual weight management are the most practical habits for catching appetite loss early, before it becomes a liver emergency.
Frequently Asked Questions
Is it serious if my cat hasn't eaten for 2 days?
Yes. A cat that hasn't eaten for 2 days should see a vet today. Cats can't safely go without food: their bodies break down fat quickly, which can lead to a serious liver condition called hepatic lipidosis, and the underlying cause of the appetite loss also needs to be found.
How long can a cat go without eating?
Call your vet if an adult cat hasn't eaten for 24 hours, and see a vet the same day once it reaches 48 hours. Kittens, senior cats, overweight cats and cats with existing health problems need help sooner. Cats can't safely fast the way dogs or people can.
What is hepatic lipidosis in cats?
Hepatic lipidosis, or fatty liver disease, happens when a cat stops eating and the body sends more fat to the liver than the liver can process. Fat builds up in the liver cells and liver function fails. It is one of the most common liver diseases in cats, and most cats recover with early, intensive nutritional support from a vet, often through a feeding tube.
How can I get my cat to eat again?
For a cat that has only missed a meal or two and is otherwise well, try warming wet food to body temperature, offering a different texture, adding a little tuna water or plain low-sodium broth, using a wide shallow dish, and feeding in a quiet spot. If your cat still hasn't eaten within 24 hours, or shows any other symptoms, call your vet.
Want more help? Our free AI symptom checker gives you emergency warning signs first, then possible causes and natural support ideas for your cat's specific situation.
PetWellness AI is run by a lifelong animal lover and dog owner who has spent years researching natural, evidence-informed care for real pet health problems. Every article is checked against published veterinary research, drafted with the help of AI tools, and reviewed before publishing. We're not veterinarians, so we always point you to your vet for diagnosis and treatment. Our story →
Citations & Sources
Valtolina C, Favier RP. "Feline Hepatic Lipidosis." Vet Clin North Am Small Anim Pract. 2017. PubMed
Center SA. "Feline hepatic lipidosis." Vet Clin North Am Small Anim Pract. 2005. PubMed
Wallace OP, Jablonski SA, Thomas JS, Bock JH, Langlois DK. "Association of time to start of enteral nutrition and outcome in cats with hepatic lipidosis." J Vet Intern Med. 2024. PubMed Central
Merck Veterinary Manual. "Hepatic Lipidosis in Small Animals." merckvetmanual.com
Bradshaw JWS. "Normal feline behaviour: … and why problem behaviours develop." J Feline Med Surg. 2018. PubMed Central
Amat M, Camps T, Manteca X. "Stress in owned cats: behavioural changes and welfare implications." J Feline Med Surg. 2016. PubMed Central
Frank D, Beauchamp G, Palestrini C. "Systematic review of the use of pheromones for treatment of undesirable behavior in cats and dogs." JAVMA. 2010. PubMed
Disclaimer: This article is for informational purposes only and does not constitute veterinary advice. If your cat has not eaten for 48 hours or shows any emergency signs, seek veterinary care immediately. Read our full disclaimer.
