Occult blood in a cat’s feces is most commonly caused by inflammation, parasites, infection, or irritation of the GI tract. The list below is concise but still medically accurate, with each cause linked so you can explore it further if needed.
🩸 Most common causes (concise)
- Intestinal inflammation — IBD or colitis can cause microscopic bleeding.
- Parasites — Hookworms and other worms attach to the gut lining and draw blood.
- Diarrhea or constipation — Irritation or straining can cause tiny tears.
- Infections — Bacterial or viral GI infections damage the intestinal lining.
- Food intolerance/allergy — Causes inflammation and mild bleeding.
- Ulcers — From stress, medications, or disease.
- Foreign object ingestion — Sharp items can scratch the GI tract.
- Tumors or polyps — Can bleed in small amounts.
- Clotting disorders — Toxins (like rodenticide) or liver disease reduce clotting.
🚩 When to worry
Seek veterinary care if occult blood is accompanied by vomiting, weight loss, diarrhea, lethargy, or appetite changes.
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