LO2 is 18 days old, and until a few days ago, she had normal poops (mechonium for the first few days, then yellow). The last few days, they've been avocado green (maybe a tiny bit more yellow than avocado).

Internet tells me lime green can be imbalance of milk, but this is often due to oversupply. I have a very, very fragile supply, and I'm confident baby is draining each breast pretty effectively. She's gaining weight slowly, but still gaining (above birth weight yesterday). We are using a little bit of donor milk as well, but it looks like there's a good amount of fat.

Does that avocado green sound normal? LO1 was formula fed, so this is new territory.