Poly-Vi-Sol or foremilk imbalance?

Kate • Baby2 due June 2020 🥰 Mommy to a preemie! 😍 Original Due Date-10.19.17 Sons DOB-9.7.17

Is anyone giving their baby this vitamin? My son is 8 Weeks, but he was 6 Weeks premature. I’m worried that I have to much foremilk because when I pump I only have like a little bit of fat at the top. I heard that it causes green poop.

Well we upped my sons poly-vi-sol to .75 last Wednesday. He has only had three poops since then. Last nights was very wet and dark green.

He is extremely gassy as well. Like his farts smell so bad.

What do you ladies think it could be?