Blood in Cat Vomit: Why This Always Needs a Vet

In this guide

Most vomiting in cats can be watched for a day before deciding whether to call the vet. Blood in the vomit is the one exception. This symptom should always prompt same-day veterinary care.

What it can look like

• Bright red streaks or fresh-looking blood
• Dark brown or coffee-ground textured vomit, which is actually partially digested blood
• Blood mixed with food or bile

Possible causes

• Irritation or ulceration of the stomach lining, sometimes linked to certain medications
• Ingesting a sharp object, bone fragment, or foreign material that has caused internal injury
• Severe, repeated vomiting from any cause, which can irritate the oesophagus enough to cause minor bleeding
• Blood clotting disorders
• Tumours in the stomach or intestinal tract, more likely in older cats
• Ingested toxins, including certain rodenticides

Why the colour matters

Bright red blood usually suggests bleeding closer to the mouth, oesophagus, or upper stomach. Dark, coffee-ground vomit suggests blood that has been partially digested, meaning it has been in the stomach for some time. Both need prompt evaluation, but coffee-ground vomit especially points to an internal issue that has been developing.

What to do

Do not wait to see if it happens again. Bring your cat to a veterinarian the same day, and if possible take a photo of the vomit to show the vet. Mention any recent access to medications, rodent bait, sharp toys, or bones, since this history speeds up diagnosis considerably.

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