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Pet Diarrhea: Foods That Cause It & Treatment Guide

Diarrhea has many food-related causes — dietary indiscretion, food allergies, lactose intolerance, or true toxicity. Severity ranges from a one-day loose stool to a vet emergency.

Severity: moderate
Bloody, black, or tarry stool; diarrhea lasting more than 48 hours; lethargy, fever, or vomiting alongside; or in puppies and kittens — call the vet right away.

Understanding diarrhea

Diarrhea is a symptom, not a disease. Fatty foods, dairy, sudden food changes, and toxic substances all cause it. Cats are more sensitive than dogs to dietary changes.

Home care

Withhold food for 12 hours, ensure water access, then bland diet for 2–3 days. Plain canned pumpkin (1 tsp for cats, 1–4 tbsp for dogs) often helps firm stools.

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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Foods that can cause diarrhea in dogs

Foods that can cause diarrhea in cats

Other symptoms to watch for