We have introduced rice, oatmeal and barley and sweet potatoes with no problem for our 6 month old twins. We started carrots Saturday and they loved them - gobbled it down and opened mouth for more. Saturday night DD , who is a 98% of the time STTN, put up a fight to go to bed and was up 6 times between 6 pm and midnight. Then woke up at 5 (instead of 7) for the day. Same thing last night. It isn't teething. I skipped the carrots today and hoping for the best.... Just curious if anyone else was in the same boat where a food interfered with sleep??? She's happy during the day and pooping regularly.