If your baby is breastfeeding, then green bowel movements with other symptoms could be a sign of an intolerance to something his mother is eating or drinking, like milk or cheese. (verywellfamily.com)
This can be an alarming sight, but rest assured finding a black to green bowel movement is perfectly normal in the first few days of life. (pregnancymagazine.com)
Signs that your baby's green bowel movements might be caused by a medical condition could include that your baby is also fussy, gassy, has diarrhea, or is vomiting. (verywellfamily.com)