Hello. Normally a simple act of eating stimulates movement in the gastrointestinal tract, and this is called the gastrocolic reflex. This stimulates contractions in the large intestine, which leads to a bowel movement shortly after eating. Usually the reflex is triggered by eating a large meal, meals that contain too much fat like fried foods, rich gravies etc..and drinking large amounts of cold liquid at the same time. But an abnormally strong gastrocolic reflex has been implicated as playing a part in some symptoms of irritable bowel syndrome (IBS). If you dont have a gallbladder, your body does not store bile as before, and bile helps you digest fat. That s why we recommend our patients to have a low-fat diet. If you ingest a lot of fatty food, chances are that you will be having more frequent bowel movements, stimulating the gastrocolic reflex. Hope this helps.