Okay, this will sound weird, but I have to mention it, bc I never read it anywhere else and I hope to share it in the case it may help someone else...
For me, it really made a difference to play around with the nursing position.
My LO had fantastic ocre poops for the first week of her life (when we were in the hospital). Then we came home, and she kept having runny green poops. I was worried about allergies (she does have a lactose sensitivity, incidentally) so I did an elimination diet. I also tried to blockfeed. Nothing seemed to stop them.
I had been nursing a lot in bed, bc I was tired a lot (lost a lot of blood in the hospital). The hospital bed enabled me to sit up easily, but our bed has a headboard with shelves so leaning back on it is rather uncomfortable. This resulted in me often laying on my back when nursing. It was comfortable and easy for me, and the baby seemed to enjoy it, too, as she likes to nurse on her tummy.
Well, she wasn't gaining weight fast so I did many things to try to make sure she was getting as much BM as possible. I came to find out I was nursing in a position called "uphill" which may have been slowing milk flow. So I bought a chair pillow for my back and nursed more sitting up since then...
Her poops changed almost instantly! They are now the fantastic ochre yellow and more solid. She also doesn't seem to poop as much (she was originally going through 6-12 dipes a day and now does 4-6). I suppose the fat and other component in the hindmilk may not have been reaching her when I was on my back—even though it appeared she'd empty my breasts. If/when I nurse on my back again for a length of time (like when I'm dead tired in the middle of the night), she almost always gets green poop.
She still doesn't gain weight terribly fast (.5 oz a day—her doc told us not to worry). We've figured out she's getting more than enough to eat since there's lots of output. She is just a *very* active baby who is just built "tall and lanky" as the doc puts it.
But it's really nice not to have to worry about foremilk/hindmilk balance anymore.