Why Is My Cat Not Eating? Common Causes Explained
It can be very worrying when your cat suddenly turns away from food. Cats are often creatures of habit, so a change in appetite is usually something owners notice quickly. While some causes of a poor appetite may be mild and short-lived, others can be more serious and may need prompt veterinary attention.
If your cat is not eating, it is important to look at the whole picture. Are they still drinking? Are they hiding, being sick, losing weight, or seeming uncomfortable? Even if your cat seems otherwise normal, ongoing loss of appetite should never be ignored.
This article explains some of the most common reasons cats stop eating, what signs to watch for, and when it may be time to contact your veterinary surgeon. If your cat has already been diagnosed with a condition and prescribed treatment, we can also help you order medication responsibly through our prescription medicine service.
This article is intended for general guidance only and should not replace professional veterinary advice. If your pet is unwell or showing concerning symptoms, please contact your veterinary surgeon.
How long can a cat go without eating?
Cats should not go without food for long. Unlike some other animals, they can become unwell quite quickly if they stop eating, particularly if they are overweight. In some cases, this can lead to a serious liver problem called hepatic lipidosis, also known as fatty liver disease.
As a general guide, if your cat has eaten very little or nothing at all for 24 hours, it is sensible to contact your vet for advice. Kittens, elderly cats, or cats with existing health conditions may need help sooner.
Common reasons why cats stop eating
Stress or changes at home
Cats can be sensitive to changes in their environment. Something that seems small to us can be enough to upset their routine and affect their appetite.
Common triggers include:
- Moving house
- A new baby or pet
- Visitors or loud noise
- Changes to feeding location
- Conflict with another cat
If stress seems likely, your cat may also hide more, appear tense, or avoid certain rooms. Creating a quiet feeding area and sticking to a familiar routine may help. In some cases, calming support such as cat pheromone products or other cat anxiety products may be useful alongside environmental changes.
Dental pain or mouth problems
One of the most common reasons for a cat not eating is pain in the mouth. Cats with dental disease may approach food and seem interested, then walk away or only eat small amounts. They may also drop food, dribble, paw at the mouth, or have bad breath.
Problems can include:
- Gum disease
- Broken or loose teeth
- Mouth ulcers
- Inflammation in the mouth
If you suspect dental pain, it is best to book a veterinary examination. Ongoing dental care may also help support oral health, and you can browse our cat dental products if your vet recommends suitable home care.
Digestive upset
Just like people, cats can lose their appetite if they feel sick or have an upset stomach. Vomiting, diarrhoea, constipation, or nausea can all make food less appealing.
This may happen because of:
- A sudden change in diet
- Eating something unsuitable
- Hairballs
- Food intolerance
- Stomach or intestinal illness
If your cat has mild digestive signs but is otherwise bright, a vet may advise monitoring or a specific diet. If symptoms continue, worsen, or your cat becomes lethargic, veterinary advice is important. For ongoing digestive support recommended by your vet, our cat digestion products may be helpful in some cases.
Upper respiratory infections
If your cat has a cold-like illness, they may stop eating because they cannot smell their food properly. Cats rely heavily on their sense of smell when deciding whether to eat.
Signs may include:
- Sneezing
- Nasal discharge
- Watery eyes
- Noisy breathing
- Tiredness
Respiratory infections can range from mild to more serious. If your cat is struggling to breathe, very flat, or refusing food completely, contact your veterinary surgeon promptly. If your cat has an ongoing diagnosed respiratory condition, you can explore our cat respiratory products where appropriate.
Pain elsewhere in the body
Cats are very good at hiding pain. A cat with arthritis, injury, abdominal pain, or another painful condition may eat less simply because they do not feel well.
You might notice:
- Less jumping or movement
- Hiding away
- Irritability
- Difficulty getting to food bowls
- Changes in grooming habits
Never give human painkillers to a cat, as many are highly toxic. If your cat has a diagnosed painful condition and your vet has prescribed treatment, you can find appropriate options in our cat prescription products section and learn more about the process in our prescription FAQs.
Kidney disease, liver disease, or other medical conditions
A reduced appetite can be a sign of many underlying health problems, especially in older cats. Kidney disease, liver disease, diabetes, hyperthyroidism, and urinary issues can all affect how much a cat wants to eat.
Other warning signs may include:
- Weight loss
- Drinking more or less than usual
- Vomiting
- Changes in toileting
- Poor coat condition
These conditions cannot be diagnosed at home, so a veterinary examination is essential. If your cat has already been diagnosed, we offer a range of support products including cat liver products, cat endocrine products, and cat urinary products, depending on your vet’s advice.
Food-related issues
Sometimes the explanation is simpler. Cats can be particular about texture, flavour, freshness, or bowl placement. They may also refuse food if it has gone stale, if the recipe has changed, or if they associate it with feeling unwell.
It may help to check:
- Whether the food is fresh and within date
- If the bowl is clean and placed somewhere quiet
- Whether your cat prefers wet or dry food
- If a recent food change may be the cause
If your cat is otherwise well, trying a gentle and familiar option may help. You can browse our cat food and treats range for suitable everyday options.
When should you contact your vet?
You should contact your veterinary surgeon promptly if your cat:
- Has not eaten for 24 hours or more
- Is vomiting or has diarrhoea
- Seems weak, sleepy, or withdrawn
- Has trouble breathing
- Is losing weight
- May be in pain
- Has a known medical condition and stops eating
Kittens, senior cats, and cats with existing illnesses should be assessed sooner, as they can become dehydrated or poorly more quickly.
What can you do at home while waiting for advice?
If your cat is still bright and your vet has advised home monitoring, a few small steps may help encourage eating:
- Offer a quiet, stress-free place to eat
- Try warming wet food slightly to make it smell more appealing
- Offer a small amount of a favourite food
- Make sure fresh water is always available
- Keep food and litter trays away from each other
Do not force-feed your cat unless your vet has specifically instructed you to do so. Avoid giving over-the-counter or human medicines without veterinary guidance, as these may be unsafe.
If your cat needs treatment or a prescription
If your veterinary surgeon diagnoses the cause of your cat’s poor appetite and prescribes treatment, we can help you access genuine medicines and health products conveniently online. You can read more about how to order a prescription medicine, complete an animal health form, or browse our full cat collection for everyday healthcare support.
If you are new to us and would like to know more, you can also visit our about us page or contact us if you need help with an order.
Conclusion
If your cat is not eating, it is always worth paying attention. In some cases, the cause may be mild, such as stress or a change in food, but appetite loss can also be an early sign of pain or illness. Because cats can become unwell quite quickly when they stop eating, it is best not to wait too long before seeking advice.
Trust your instincts as an owner. If something feels wrong, or if your cat has gone without food for a day, speak to your veterinary surgeon. Early assessment can make a real difference.
At Vetscriptions, we are here to help you care for your cat with trusted products, clear guidance, and responsible access to prescribed medication when needed. You are welcome to explore our cat healthcare range, read more about our prescription service, or contact your veterinary practice for personalised advice if your cat is unwell.