I got a potty bowl and have been putting DS2 on it at each diaper change -- he is almost always pooping in the potty right now. I am floored, really. (We didn't start EC with DS1 until he was around 3 months old.)
Anyway, he often has regular bf-poo (bright yellow, seedy, etc. with some liquid) and then he will have some poos that are mostly just foam.
I know that I have a lot of milk (due to tandeming) and his poops aren't green at all, so I don't think this is the "frothy, green poops" due to overactive letdown... but I am not sure about the foam. I don't remember DS1 having them (but then again, we weren't ECing him at this age). If the foamy poos go in a diaper or I wipe them, they just look like a stain.
I'm just curious, anyone else's little one making lots of foam?