Cue, I have just seen this thread and read your OP, so haven't read all your replies, but in answer to your original question, when my babies were exclusively breastfed, every now and then they would have a green poo or the usual mustard colour with green stringy type bits through it (not unlike your photo). I asked the ABA and they told me it was something to do with the baby getting too much fore milk quickly and not enough hind milk (the rich milk) and an imbalance between those or something like that anyway.
When I found that out I would make sure bub spent longer feeding before I would change sides, just to make sure the hind milk was being consumed enough and sure enough the poos would go back to mustard colour again. I will try and find a link or some literature for you, and not just my lay man suggestion!
It's all such a mystery, I so wish you could plug a baby into a computer and get some sort of health status output!!
Oh, if only hey, then all these little health status mysteries would be clear.
Have now had a chance to read the rest of the thread, andI guess you can eliminate one possible thing (hind/fore milk/over supply). I hope everything turns out to be okay and not allergy/intolerance related.
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