Why Won’t My Cat Eat? Causes, Home Remedies, and When to See a Vet
A cat that won't eat can be stressful for any pet parent, especially if they usually come running to the bowl. Sometimes it's stress, a routine change or food preference. Sometimes it can be something more serious.
Cats can deteriorate quickly if they stop eating, which is one of the most important reasons to pay attention early. In this guide, we look at common medical and non-medical reasons cats stop eating, safe steps that can help tempt appetite, and when it's a good idea to contact your vet. Key claims are supported by peer-reviewed veterinary sources listed at the end.
Why Won't My Cat Eat?
There is a big difference between reduced appetite and complete refusal to eat. Neither should be ignored. If you've long assumed a cat is just a picky eater, it's worth ruling out medical causes rather than accepting the pattern as normal.
Cat appetite matters more than many pet parents realise. Cats are more vulnerable than many other animals to complications from not eating. If a cat stops eating for even a few days, it can lead to hepatic lipidosis (fatty liver disease). In this condition, fat is mobilised from the body's stores faster than the liver can process it, causing fat to accumulate in liver cells and impair liver function.[1][2] Hepatic lipidosis is one of the most common liver diseases seen in cats and can develop within just a few days of a cat not eating.[1][3]
If your cat has stopped eating, thinking through a few key questions can help you and your vet identify possible causes:
- Have there been any big changes recently, such as food, routine, people, pets, moving, or noise?
- Have you noticed any vomiting or diarrhoea, hiding, drooling, bad breath, weight loss or lethargy?
- Is your cat also drinking less than usual?
Common Medical Reasons a Cat Won't Eat
There can be many medical reasons behind loss of appetite in cats. Some common ones include:
- Dental and mouth pain: Signs can include drooling, bad breath, pawing at the mouth, chewing on one side, dropping food, and showing an unusual preference for softer foods.
- Upper respiratory infections: Cats rely heavily on smell to assess food, so congestion can reduce appetite. Look for sneezing, nasal discharge, watery eyes and noisy breathing.
- Nausea and gastrointestinal issues: Not eating can be a sign of gastroenteritis, parasites, pancreatitis, dietary indiscretion or food intolerance. Look for lip-licking, drooling, vomiting, diarrhoea and a hunched or "meatloaf" posture.
- Pain elsewhere in the body: Pain, including from arthritis, can suppress appetite. Signs may include reduced jumping, stiffness, reluctance to move or a hunched posture. Our guide on arched back in cats covers subtle posture clues that may indicate discomfort.
- Chronic disease: Kidney disease, liver conditions, diabetes and cancer can all affect appetite. Weight loss, increased thirst, a dull coat or lethargy can be signs. Hyperthyroidism can also affect appetite, particularly in older cats. Our guide on how to treat hyperthyroidism in cats covers this in more detail.
- Foreign body or toxin ingestion: Repeated vomiting, abdominal pain, sudden severe lethargy, drooling or gagging alongside loss of appetite could suggest your cat has ingested something dangerous.
If any of these signs match what you are seeing, contacting your vet promptly for advice is often the safest approach.
Red Flags: When It's an Emergency
Some situations need urgent veterinary attention rather than waiting to see if things improve.
If a cat has not eaten anything for around 24 hours, contacting a vet is generally a good idea. If a cat is not eating and also not drinking, the recommendation is to contact a vet straight away without waiting. For kittens or elderly cats, this is particularly urgent.[3][4]
Other emergency signs include:
- Trouble breathing
- Collapse or extreme weakness
- Repeated vomiting
- Blood in vomit or stool
- Severe diarrhoea
- Suspected toxin or foreign body ingestion
- A painful abdomen
- Seizures
- Sudden yellowing of the eyes or gums (jaundice)
Without prompt treatment, prolonged not-eating can lead to dehydration, hepatic lipidosis or worsening of an underlying disease.[1][2]
Before calling the vet, it can help to note when your cat was last seen eating and drinking, and any recent changes in food, medications or the household.
Non-Medical Causes: Stress, Routine Changes and "Trained Pickiness"
Stress and anxiety are among the most common non-medical reasons cats stop eating. Signs often include hiding, hypervigilance and reduced play. Common triggers include:
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- Moving house
- Guests
- Building works
- A new baby
- A new pet
- Litter tray changes
- Conflict with another cat
- Loud noises
Sometimes the problem is the feeding setup rather than the cat. The bowl may not be clean enough, the bowl material may put the cat off, or the bowl shape or feeding location may be a factor. Cats can also be more selective than pet parents realise, particularly around scent, temperature and texture.
If a cat is receiving frequent treats, those calories may already be meeting daily needs, which can reduce interest in main meals.
How to Get Your Cat Eating Again
If a cat's appetite issue seems more likely to be behavioural or preference-related than medical, there are safe steps that can help tempt them back to food. It's still worth checking with your vet if the issue lasts more than a day or comes with any other signs.
- Make food smell stronger: Gently warm wet food (not hot) and add a small amount of warm water to release aroma.
- Offer small, frequent meals rather than one large portion.
- Change the setup: Move the feeding station to a quiet spot, make sure the bowl is clean, consider a wide plate, and separate other cats at feeding time.
- Prioritise hydration: Fresh water always helps. Some cats prefer running water and may drink more from a fountain.
Tuna is a well-known appetite trigger, and other strong-smelling wet foods can help. A small amount of plain cooked chicken or fish (no salt, no seasoning, no bones) can also work as a topper. These are appetite-triggers for short-term use, not a long-term diet, as they are not nutritionally complete on their own.
Switching Cat Food Without Refusal: A Transition Plan
If a change of food is behind the refusal, or you want to switch a cat over to a new diet, a gradual transition tends to work best. Here's a common approach:
| Days | Old food | New food | What to do |
|---|---|---|---|
| 1 to 3 | 75% | 25% | Mix thoroughly. Keep mealtimes consistent and offer small portions. |
| 4 to 6 | 50% | 50% | If stools stay normal and your cat is eating reliably, continue. If not, slow down. |
| 7 to 10 | 25% | 75% | Maintain the same brand or texture style where possible (e.g. pâté to pâté). |
| 11 to 14 | 0% | 100% | Fully switch. Monitor appetite, hydration and litter tray output for a few days. |
Another approach is to offer the new food at the normal mealtime, then remove it after 20 to 30 minutes and offer a smaller portion of the old food. Some cats respond better to this than to blending.
How Litter Sense Can Help
When a cat stops eating, reduced water intake often follows, and urine concentration can shift. Underlying conditions that can suppress appetite, such as kidney disease, diabetes or urinary problems, may also show up in urine changes before other symptoms become obvious.
Litter Sense monitors your cat's urine daily and changes colour if it detects an abnormal pH balance or the presence of blood. This can give pet parents an early sign to book a vet appointment, particularly if appetite has also dropped.
Frequently Asked Questions
How long can a cat go without eating?
An adult cat generally should not go more than around 24 hours without eating. Beyond that, the risk of complications such as hepatic lipidosis increases.[1][2] Kittens, elderly cats and cats with existing health conditions may need to be seen sooner. If a cat is also not drinking, contacting your vet without waiting is the safer approach.
Why is my cat drinking water but not eating?
This can indicate nausea, dental pain, illness or stress. Drinking without eating still warrants a vet call, especially if it lasts more than a day. Some conditions such as kidney disease and diabetes cause increased thirst alongside reduced appetite.
What can I feed a cat that won't eat?
Starting with the cat's usual food warmed slightly to release aroma often helps. If that doesn't work, a strong-smelling wet food, plain cooked chicken (no salt, no bones) or a small amount of tuna in springwater can serve as short-term appetite triggers, not a long-term diet.
Should I force my cat to eat?
Force-feeding at home isn't recommended. It can cause aspiration pneumonia and increases stress. If a cat isn't eating, contacting your vet is safer. Vet-supervised options, including appetite stimulants or assisted feeding, are available when needed.
Can stress alone stop a cat from eating?
Yes. Stress is one of the most common causes of appetite loss in cats. Moving house, new pets, guests or a bowl in the wrong place can all put a cat off eating. If stress is the likely cause, addressing the trigger and offering food in a calm environment often helps within a day or two. If not, a vet check is the safer next step.
Why won't my kitten eat?
Kittens should never be left without food for long. If a kitten refuses food for more than a few hours, contact your vet without waiting. Kittens have very small energy reserves and can deteriorate quickly.
Important: This article is general educational information about feline appetite loss and does not constitute veterinary advice for any individual cat. If your cat is unwell, showing new or worsening symptoms, or you have specific concerns about their health, please consult a registered veterinary surgeon who can examine your cat and provide personalised guidance.
References
- Merck Veterinary Manual. Feline Hepatic Lipidosis. Available at: https://www.merckvetmanual.com/digestive-system/hepatic-diseases-of-small-animals/feline-hepatic-lipidosis
- VCA Animal Hospitals. Hepatic Lipidosis (Fatty Liver Syndrome) in Cats. Available at: https://vcahospitals.com/know-your-pet/liver-disease-fatty-liver-syndrome-in-cats
- International Cat Care. Anorexia and appetite loss in cats. Available at: https://icatcare.org/articles
- PDSA. When to see a vet for cat health concerns. Available at: https://www.pdsa.org.uk/pet-help-and-advice/pet-health-hub
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