My (EBF, no supplement, no bottle, no solids) 24 week old baby has been doing dark green stringy "sharts" about 10x a day now for at least a week. This includes a minimum of 2-3 overnight which wake him and disturb his sleep (this is in addition to his night feeds, which are minimal now, only 2-4).
WHAT is happening? They are green, stringy, and very light but enough to upset. Those darker yellow thicker poos haven't been seen since. He is not sick, not obviously teething, and napping well/cheerfu.