Been having feces that smell like burnt hair. the color is normal though. i've had this in the past but goes away over time. i recently had a ct scan of the abdomen and nothing abnormal was found.

Stool smell: The odor of our stools is usually a reflection of our diet. Occassionally, odor changes can be related to a variety of infections with bacteria or parasites. Your doctor can easily assess for this by sending samples of your stool to a laboratory for testing.

You have the answer: If the smell is intermittent, it has do with something you ingest. Sometimes it might be inhaled. Any changes in your meds, any supplements that you take? Try to keep a log and include activities. In few weeks you will have your answer.