Not eating in cats: what to do
Over 24 hours without food puts a cat at risk of fatty liver disease; over 2 days is a must-see.
What are the common causes?
Hepatic lipidosis (fatty liver)
Emergency β go nowJust 2-3 days of anorexia can trigger fatty liver in cats; overweight cats are at higher risk β an emergency.
Feline infectious peritonitis (FIP)
Emergency β go nowCaused by a mutated coronavirus; young and stressed cats are prone β the wet form shows a swollen belly.
Linear foreign body / intestinal obstruction
Emergency β go nowCats love string, hair ties and thread β linear foreign bodies slice the intestine; a surgical emergency.
Stomatitis / severe periodontal disease
See a vet within 24 hoursSevere oral inflammation makes cats refuse food, drool and paw at the mouth β needs professional dental care.
Feline pyometra (uterine infection)
Emergency β go nowA post-heat emergency of unspayed females, often better hidden than in dogs (cats lick away discharge). Thirst + lethargy + a changing belly deserves high suspicion; surgery is the cure.
Upper respiratory infection (cat flu)
Monitor for 48 hoursMostly herpes/calicivirus; kittens and unvaccinated cats are at risk β a blocked nose leads to refusing food.
Hairball syndrome
Monitor for 48 hoursSwallowed fur accumulates in the stomach β the occasional one is normal; frequent ones mean clearance is failing.
Acute gastroenteritis
Monitor for 48 hoursFast food changes, diet indiscretion or mild infection; cats tolerate fasting poorly, so prevent dehydration.
Feline panleukopenia (feline distemper)
Emergency β go nowA severe viral disease of unvaccinated kittens with high mortality β needs isolation + intensive support.
Chronic kidney disease (CKD)
See a vet within 24 hoursThe most common chronic disease of senior cats; early signs are subtle β blood creatinine + urinalysis stage it.
Stress / anxiety-related behavior problems
Home monitoringMoving, new pets or visitors can trigger hiding, soiling and over-grooming β but rule out medical causes first.
Home care & observation tips
- βNote the time of the last meal
- βGo to the vet immediately (feeding tubes are often needed)
- βLook for the cause of the anorexia
- βSee the vet immediately (treatments now exist)
- βWatch other cats in the household
- βLog temperature and belly size
When must you see a vet?
- β Barely eaten for 48 hours
- β Jaundice (yellow gums or inner ears)
- β Young cat with recurring fever + growing belly/weight loss
- β Wobbliness or other neurological signs
- β Repeated vomiting + refusing food
- β Known play with string followed by vomiting
FAQ
Is not eating in cats serious?
It depends on the combination of symptoms, how long it has lasted, and your pet's energy and appetite.Note that it can appear in problems that need prompt care, such as Hepatic lipidosis (fatty liver), Feline infectious peritonitis (FIP), Linear foreign body / intestinal obstruction. Enter the full symptom combination in our symptom checker for a more specific urgency assessment.
Can I monitor at home first? What should I watch?
If energy and appetite are normal with no other signs, 24-48 hours of monitoring is reasonable. Keep notes on frequency, duration, appetite, water intake, energy and what the stool/urine looks like β vets find this very useful.
What should I prepare before the clinic?
Note when the symptom started and how it changed; bring packaging or residue if ingestion is suspected; bring vaccination and deworming records; and if possible take a video (odd gait, cough sound) β clearer than describing.
Not sure how serious it is? Assess it with the symptom checker
Start symptom check β
