(Was contemplating posting a picture of a dirty diaper but I'll spare the rest of the world.)
If the poop's colour is a nice mustard yellow then your baby coming along fine.
If it is pale then you need to watch the baby more carefully.
Greenish poop normally indicated that the baby is not feeding enough.
This is quite common when the baby has jaundice which makes it sluggish, sleepy most of the time, and won't feed properly.
As for nursing moms, we have to cut down intake of herbs*, namely Chinese herbs, because the baby's liver cannot cope with processing the essence of the herbs from the mother's milk on top of trying the clear bilirubin of the blood.
So we have been looking at Myron's poop (diaper gazing? :P) the past few days. Just now it was mustard yellow again, but the whole day today it had been a pale green.
We will continue to sun him, but if he shows no improvement then we might have to send him in for photo therapy again.
I hope not. I will miss him so so much.
So will the rest of the household.
* This does not include ginger and red dates. According to the doctor's advice these are ok. It's the more "potent" ones like tong-guai, etc. that should be avoided until the baby is well again.