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It may be an unpleasant topic, but it's essential to address: the various types of cat vomit and the appropriate times to consult a veterinarian. Not all instances of vomiting in cats are identical; understanding the different forms can provide insight into potential health issues. By examining the characteristics of the vomit, pet owners can better determine when it is necessary to seek professional advice for their feline companions.

Types of Cat Vomit — and When to See the Vet 2

Yellow Vomit

Possible Cause:
• Yellow vomit often contains bile — a digestive fluid made by the liver.
• It usually happens when your cat’s stomach is empty, and bile starts to irritate the stomach lining.
What to Do:
• Feed smaller, more frequent meals (every 6–8 hours).
• Avoid long gaps between meals.
Risk Level: 4/5
When in doubt, consult your vet — especially if it happens regularly.

Types of Cat Vomit — and When to See the Vet 3

Hairball Vomit

Possible Cause:
• Caused by ingesting a large amount of hair during grooming.
What to Do:
• Withhold food for 6–8 hours.
• If vomiting stops, offer small portions of water and food.
• Use a hairball remedy and regularly groom your cat to reduce shedding.
Risk Level: 2/5
Generally manageable, but check in with your vet if it persists.

Types of Cat Vomit — and When to See the Vet 4

Green Vomit

Possible Causes:
• Eating grass or other green substances
• Bile reflux
• Gastrointestinal issues like gastritis or pancreatitis
What to Do:
• Withhold food for 5 hours.
• Slowly reintroduce food and water.
• Consider probiotics if improvement continues.
Risk Level: 4/5
Don’t ignore green vomit — vet attention is strongly recommended.

Types of Cat Vomit — and When to See the Vet 5

Foamy Vomit

Possible Cause:
• Often caused by stomach acid buildup or an empty stomach
• Could also point to gastritis or more serious conditions
What to Do:
• Feed smaller, more frequent meals
• Monitor closely for patterns or other symptoms
• If vomiting is frequent, contact your vet
Risk Level: 3/5
One-off events may not be serious, but repeat episodes need professional attention.