Started to only BF at night now Olive green poo?

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21 week old DD2 was EBF with ooccasional couple oz formula up till a week ago. Now 50% FF and poo has turned olive green. Used to be mustard. Same consistency and she is still happy. Is this colour normal in FF babies?

Hi there - poo goes green occassionally - in both FF and BF babies - can be a sign of dehydration or just a little bug. It will probs right itself in a couple of days..