I mix feed breastmilk and nutrimigen (due to low supply). My dd (almost 6 months) has had a thick dark grey semi solid formed slime in her poo on a few occasions. I initially thought it was down to a CMPA we suspect she has, but the last two times she’s had it she had no dairy (via breast milk). I know nutrimigen has broken down milk protein but would have thought she’d get this far more regularly if that was the cause. Has anyone else experienced anything like this? Shame I can’t post a photo, although it’s not pleasant!