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Urgent

See your vet within 24 hours. Do not wait to see if symptoms resolve on their own.

Why Is My Cat Not Eating?

CatUrgent
Quick Answer

A cat not eating for more than 24-48 hours is a serious concern. Unlike dogs, cats can develop hepatic lipidosis (fatty liver disease) within just 2-3 days of not eating, which can be fatal. Contact your vet if your cat misses more than 2 meals.

What You Need to Know

Loss of appetite in cats is more medically urgent than in dogs because cats are uniquely susceptible to hepatic lipidosis (fatty liver disease). When a cat — especially an overweight cat — stops eating, the body mobilizes fat for energy, overwhelming the liver's capacity to process it. This can begin within 2-3 days of complete food refusal and can be fatal without treatment.

Common reasons cats stop eating include: upper respiratory infections (a congested cat can't smell food, and cats rely heavily on smell to eat), dental pain, stress from environmental changes (new pet, new home, moved furniture), urinary tract problems, kidney disease, and GI issues like inflammatory bowel disease or pancreatitis.

Cats are also notoriously particular about food. A change in brand, flavor, temperature, bowl type, or bowl location can cause food refusal. Some cats develop "food aversions" after being ill — they associate the food they were eating when they felt sick with feeling bad and refuse it permanently.

Pay attention to whether your cat is interested in food but not eating (approaches the bowl, sniffs, walks away — suggests nausea or dental pain) versus completely disinterested in food (suggests systemic illness or severe stress).

For cats hiding and not eating, this combination is especially concerning. Cats hide when they feel very unwell, and the combination of hiding + inappetence often indicates a medical problem that needs prompt attention.

Common Causes

  1. Upper respiratory infection — nasal congestion prevents smell, reducing appetite
  2. Dental disease — painful teeth make eating uncomfortable
  3. Stress — new pet, new home, schedule changes, visitors
  4. Kidney disease — especially in cats over 7 years old
  5. Urinary tract disease (FLUTD) — pain and nausea reduce appetite
  6. Gastrointestinal issues — IBD, pancreatitis, foreign body
  7. Food aversion — cat associates current food with feeling ill
  8. Nausea from any cause — hairballs, toxins, medications

Breed Variations

Overweight cats of any breed are at higher risk for hepatic lipidosis when they stop eating. Persian and Himalayan cats are prone to dental disease that can cause inappetence. Siamese and Oriental breeds may be more stress-sensitive. Maine Coons and Ragdolls, being larger cats, may mask illness longer before appetite loss becomes obvious.

When to Worry

See a vet if your cat hasn't eaten for 24 hours (12 hours for kittens), if your cat is also hiding or unusually lethargic, if there is vomiting or diarrhea along with not eating, if your cat is overweight and has stopped eating completely (high risk for hepatic lipidosis), if your cat is drooling or pawing at their mouth (dental pain), or if your cat is straining in the litter box.

When NOT to Worry

If your cat skips a single meal but is otherwise active, drinking water, and comes back for the next meal, this is usually fine. Cats may eat less in very hot weather or if they've been hunting/eating prey outside.

Home Care Tips

Try warming food to body temperature to enhance aroma. Offer strong-smelling foods like tuna juice or meat baby food (without onion or garlic). Try a different protein or brand. Ensure the feeding area is quiet, clean, and away from the litter box. If your cat has nasal congestion, steam from a hot shower can help clear airways. Do NOT force-feed without vet guidance.

When to See a Vet

See your vet within 24 hours. If symptoms worsen before your appointment, go to an emergency clinic.

When in doubt, call your vet. A quick phone consultation can help you decide if an in-person visit is needed.

Related Questions

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