If the baby is in good spirits and eating normally, without any mucus or blood in the stool, green stools are generally normal. The current situation suggests gastrointestinal dysfunction, so it’s recommended to take oral probiotics to regulate the gastrointestinal function and observe the situation. At five months, the baby is still a young infant, and diarrhea with watery stools and mucus may be caused by an intestinal infection. In this case, it is suggested to continue using Montmorillonite powder and probiotics, and also to add antibiotic treatment. The presence of mucus should be due to an infection.