My Wife, A Very Healthy Person, 61 Years Of Age,

My wife, a very healthy person, 61 years of age, had a colonoscopy one week ago. The results were normal. She rid herself of the gas that day and began eating small meals right up to today. Since the procedure she has had buttery stool (very unusual for her) to the point that she has leaked a number times per day. The stool is not dark. She has honestly not had time to call her doctor. She does not have a fever and feels fine otherwise. Any idea what is going on?