What causes blood in a cat feces?

Our question this week was:

My cat has blood in feces, what is this caused by?

TJ Dibiaso


Hi – thanks for your email. Blood in the feces can be caused by several reasons. Fecal blood can be digested (look black and tarry) which means it comes from the stomach. The most common reasons for that is a stomach problem or an oral problem (such as a tooth problem from which they swallowed blood). They can have ulcers and cancer.

Bleeding from the lower gastrointestinal track is more likely to look like fresh blood.

It can be caused by a variety of things including: