Cat Throwing Up and Won't Eat? Here's What to Do Right Now

A cat that vomits once and then bounces back to the food bowl is rarely cause for alarm. But a cat that is both throwing up and refusing to eat is telling you something more significant — and knowing how to read the signs could make a meaningful difference.

Here's a practical, clear-eyed guide to what's happening, what to do right now, and when to call the vet.

Is It an Emergency? Check These Signs First

Before anything else, assess whether your cat needs immediate veterinary attention. The combination of vomiting and not eating becomes an emergency when accompanied by any of the following:

Go to the vet immediately if you see:

• Blood in the vomit (red or dark brown "coffee grounds" appearance)

• Vomiting that is forceful, repeated, or happening every hour

• Distended or painful abdomen — especially if the cat reacts when you touch their belly

• Signs of dehydration: sunken eyes, dry gums, skin that doesn't spring back when gently pinched

• Extreme lethargy — unable or unwilling to move normally

• Open-mouth breathing or labored breathing

• Known or suspected ingestion of a toxin, plant, or foreign object

• No urination for 12+ hours — especially in male cats (potential urinary blockage)

• A kitten under 6 months or a senior cat over 12 years — both age groups decompensate faster

If your cat has any of these symptoms, don't wait. This is a same-day emergency vet visit.

When It's Likely Not an Emergency

A cat that vomits once or twice, then seems tired but stable, is not necessarily in danger. The most common causes of this presentation are:

Hairballs — the most common cause of vomiting in cats, particularly in long-haired breeds or heavy groomers. The cat may vomit foam or bile before producing a hairball, and may feel nauseous and disinterested in food for a few hours afterward.

Dietary indiscretion — eating too fast, eating something that didn't agree with them, or a food change introduced too quickly. Cats who eat very fast can vomit undigested food shortly after meals.

Motion sickness or stress — car rides, vet visits, or household changes can trigger vomiting and temporary appetite loss in sensitive cats.

Mild gastrointestinal upset — viral or bacterial gastroenteritis in cats is common and usually self-limiting. The cat may vomit a few times, feel off for 12–24 hours, and then gradually return to normal.

Post-anesthesia nausea — cats recovering from surgery or sedation frequently vomit and avoid food for 12–24 hours as the anesthetic clears their system.

How Long Can a Cat Go Without Eating After Vomiting?

This is where cats require more careful monitoring than most owners expect.

Cats that vomit and then stop eating are at risk of developing hepatic lipidosis (fatty liver disease) if food deprivation extends beyond 48 hours. This condition occurs when the body begins breaking down fat stores for energy — a process the feline liver handles poorly, leading to fat accumulation in liver cells.

Practical timeline:

• 0–12 hours after vomiting: Withhold food for 2–4 hours to let the stomach settle, then offer a small amount of bland food

• 12–24 hours: If the cat still won't eat, monitor closely. Try appetite-stimulating strategies (below)

• 24–48 hours without eating: Call your vet — don't wait for the situation to resolve on its own

• 48+ hours without eating: Treat as urgent — same-day vet visit

What to Do at Home Right Now

If your cat has vomited and won't eat, but doesn't have emergency symptoms, here's the right approach:

1. Withhold food briefly, then offer something small and bland

After vomiting, wait 2–4 hours before offering food. This gives the stomach lining a chance to settle. Then offer a very small amount — a tablespoon — of something gentle:

• Plain boiled chicken breast (no seasoning, no oil)

• Plain white rice mixed with a small amount of chicken broth (low sodium)

• A commercial bland diet food your vet may have on hand

If the cat eats a small amount without vomiting again, continue offering small portions every few hours rather than a full meal.

2. Ensure fresh water is available

Vomiting causes fluid loss. Make sure fresh, clean water is easily accessible. If your cat won't drink, try offering water from a running tap, a pet fountain, or ice cubes in the bowl.

3. Try a high-value protein topper to restart appetite

Once the initial vomiting has settled, getting a recovering cat interested in food again is the main challenge. The smell and intensity of freeze-dried protein treats can cut through nausea-related appetite suppression in ways that regular food often can't.

Crumbling a small amount of freeze-dried chicken, beef liver, or salmon over a tiny portion of wet food can be enough to get a reluctant cat eating again after a vomiting episode. The concentrated natural protein aroma is often more effective than any other appetite stimulant at this stage.

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4. Keep the environment calm and quiet

Stress amplifies nausea in cats. Keep the feeding area quiet, away from household traffic and other pets. If you have multiple pets, feed the recovering cat in a separate, private space.

5. Monitor litter box output

A cat that is vomiting and not eating should still be producing some urine. If you notice no litter box visits for 12+ hours — especially in a male cat — this is an emergency situation. Urinary blockages in male cats can become life-threatening very quickly.

Common Causes of Vomiting + Appetite Loss Together

When both symptoms occur simultaneously, the most likely causes are:

Gastrointestinal inflammation or infection — viral gastroenteritis, bacterial infection, or inflammatory bowel disease (IBD) can cause both vomiting and reduced appetite. IBD is one of the most common GI conditions in middle-aged and senior cats.

Kidney disease — one of the leading conditions in older cats. The toxin buildup from compromised kidney function causes nausea, vomiting, and reduced appetite. If your senior cat shows these symptoms, bloodwork is warranted.

Pancreatitis — inflammation of the pancreas causes nausea, vomiting, and appetite loss. It's more common than previously thought in cats and can range from mild to severe.

Hyperthyroidism — common in cats over 10 years, hyperthyroidism can cause vomiting, weight loss, and increased or decreased appetite. Usually accompanied by other signs including increased thirst and hyperactivity.

Foreign body ingestion — string, rubber bands, hair ties, and other linear foreign bodies are particularly dangerous in cats. Vomiting and appetite loss with a known history of chewing on linear objects is an emergency until proven otherwise.

Toxin ingestion — lilies, certain cleaning products, and many human medications are toxic to cats. Vomiting with appetite loss following known or suspected toxin exposure is always an emergency.

Restarting Appetite After Recovery

Once vomiting has stopped and your cat is holding food down, the transition back to regular meals should be gradual:

• Day 1 of recovery: Small amounts of bland food every 4–6 hours

• Day 2: Begin mixing small amounts of regular food into the bland diet

• Day 3–4: Gradually increase the proportion of regular food

• Day 5: Return to normal feeding if the cat is tolerating food well

Throughout the recovery period, a high-quality protein topper crumbled over food can help maintain interest and encourage consistent eating. Chef Kitty's freeze-dried single-ingredient treats — chicken, salmon, beef liver, or chicken heart — work particularly well for this purpose, providing concentrated protein aroma that encourages eating without introducing complex ingredients that could upset a recovering stomach.

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When to Call Your Vet — Summary

The Bottom Line

Vomiting and appetite loss together in a cat requires more attention than either symptom alone. The 24–48 hour food timeline matters more in cats than in most other animals — act sooner rather than later if your cat refuses food after vomiting.

At home, the priority is keeping the stomach settled, ensuring hydration, and gradually reintroducing food with small, appealing portions. If appetite remains suppressed for more than 24 hours, your vet should be involved.

Related articles:

• My Cat Won't Eat — How Long Is Too Long?

• My Cat Eats Treats But Not Food — Here's What's Going On

• Natural Cat Appetite Stimulants That Actually Work

• What Cat Treats Are Actually Healthy?

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