That 2 times 便便 was 1) it's more like dark brown and 2) the next time was yellow surrounded with black. Anyway, yesterday morning one, my maid told me it's black, after returned home to see by myself, it's actually like you said 墨綠色便便. She scared me to death. Fortunately, since yesterday evening she seems to be fine - able to drink milk & water and sleep. I am less worried now.
Though still coughing with spit and running nose, she seems to be better. As 猴棗末 is not for stopping running nose, I did also continue to give 西葯. Probably need more time to get recovered.