Amelia Taylor – Cornell University College of Veterinary Medicine
Common Reasons Cats Vomit
1. Hairballs (Most Common and Often Normal)
Cats swallow hair while grooming.
- Hair accumulates in the stomach
- Vomiting usually contains hair mixed with foam or liquid
- More common in long-haired cats
Occasional hairball vomiting is normal, but frequent episodes are not.
2. Eating Too Fast or Overeating
Cats that eat quickly may vomit shortly after meals.
- Undigested food
- Happens soon after eating
- Usually no other symptoms
Slow-feeder bowls can help reduce this.
3. Dietary Issues or Food Sensitivities
Sudden diet changes can upset your cat’s stomach.
- Switching food brands too quickly
- Food intolerance or allergies
- Spoiled or contaminated food
Vomiting may be accompanied by diarrhea or reduced appetite.
4. Stomach Irritation or Inflammation
Gastritis can cause repeated vomiting.
- Ingestion of grass, plants, or foreign objects
- Stress-related stomach upset
- Certain medications
5. Parasites or Infections
Internal parasites or infections may cause vomiting along with:
- Weight loss
- Lethargy
- Poor coat condition
6. Serious Medical Conditions (Less Common but Important)
Persistent vomiting can indicate:
- Kidney disease
- Liver disease
- Pancreatitis
- Intestinal blockages
These usually involve additional symptoms and require veterinary care.
What You Should Do Immediately
- Observe frequency and appearance of vomit
- Note appetite, energy levels, and litter box habits
- Remove access to plants or non-food items
- Avoid giving human medications
- Keep your cat hydrated
When to See a Vet (Very Important)
Contact a veterinarian promptly if:
- Vomiting happens more than once in 24 hours
- There is blood or dark material in vomit
- Your cat stops eating or becomes lethargic
- Vomiting is accompanied by diarrhea or weight loss
