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Pet Bloody Diarrhea: Causes & When It's Urgent

Blood in stool — bright red or dark/tarry — needs prompt evaluation. Can come from inflammation, parasites, sharp objects, or toxicity.

Severity: severe

Same day if mild, immediate if heavy or with vomiting/lethargy.

Understanding bloody stool

Bright red = lower GI bleeding. Black/tarry = upper GI. Both warrant a same-day vet visit.

Keep a sample for the vet if practical. Don't give over-the-counter anti-diarrheals — many are toxic to pets.

Emergency contacts

ASPCA Animal Poison Control: 888-426-4435

Pet Poison Helpline: 855-764-7661

Both are 24/7 — small consultation fee may apply.

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