Green poop

First, I'm so glad to read that other mommas are mostly pumping and feeding through a bottle! I've been so discouraged about that, but now that she is a month old she is getting better at latching. Baby steps, but making progress. Don't give up mommas!

Anyway, I've read that green poop could mean she isn't getting enough hind milk among other things. When should I worry about green poop?