You might want to get checked for C. diff. When I had "bile" diarrhea that's what was causing it. Do you have inflammation of your terminal ileum? That's where bile is reabsorbed. There is another condition that causes your body to pump out more bile than it is supposed to as well... I can't remember what it was called but it is treatable. You may want to mention this symptom to your doc to see if something can be done about it. This is assuming it is bile making it green anyway. But no, it's not "normal," it's not too uncommon among our kind, however. Hehe.