My dog threw up blood. What causes it and when should I see a vet?
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Blood in the vomit indicates most commonly stomach lining irritation or ulceration. The only way heat could cause this is if Doggy is experiencing heat stroke (high body temperature, collapse, etc). When a dog is having heat stroke it is obvious and life threatening. Just general hot weather shouldn't cause vomiting let alone with blood. Causes of vomiting are: viral (especially parvo) or bacterial infections, intestinal parasites, he ate something inappropriate, pancreatitis, a blockage from eating a foreign object that is stuck, toxin ingestion, clotting or platelet problem or from something local to Lebanon. If he continues to vomit with blood that is an emergency and he should be seen by a Vet. If he is lethargic and won't eat currently he should see a Vet. Otherwise I would start a bland diet of boiled chicken breast with rice. Feed 1 cup per 20 lbs per day for 3-5 days to rest his stomach.
i wish you the best!
Updated on September 23rd, 2025