Do the other droppings, between the cecal looking ones, look normal? Cecal droppings will generally happen two or three times a day, about every 10 poops, and color/consistency/odor can vary a lot depending on what they are eating. If you changed feeds, then the droppings could change from that. Birds that range for any part of the day tend to find all kinds of things to eat that can change the droppings. If the other droppings look normal, and she's acting normal, then I wouldn't worry. If droppings are regularly runny or mucousy, or you see a lot of intestinal shed, or a bird loses weight/body condition or appears off or unwell, then see if you can get a fecal test done to check for internal parasites. The only ones you usually see in droppings are tapeworm segments and roundworms, and often even those aren't seen with the naked eye, the fecal test looks for the eggs, which are microscopic.
