Anyone had any experience of this? Is it even possible? DD is 8.5 months and bf, we blw and she eats 3 good meals a day and snacks if she wants them but since Monday afternoon she's been having some awful nappies, either dark yellowy and quite mucusy looking or green and stringy.
The only thing I can thing that's changed is she had one bottle of frozen bm on Sunday and two on Monday. I thought it was all cleared up this morning but she had a bottle of milk I expressed Monday (not frozen this time) and her nappy was green again 
She would usually have one bottle on a mon,wed and Thursday with the cm but this is the first time we've had this problem. She hasn't eaten anything she's not had before and she seems well in herself except a lot of wind so I don't think she's I'll either.
She doesn't seem to be in any particular discomfort except a couple of seconds of whinging before farting or pooing so I'm at a bit of a loss really