Hello, I have read carefully your concern and i ll try to give you my best to clarify your doubts. Well, newborns and infants fed with breast milk generally have yellowish or greenish stools, and a almost liquid consistency and of an explosive nature. This type of stool is usually performed after each breastfeed and should not be confused with diarrhea, neither for its frequency nor for its consistency, since they are completely normal. This phenomenon is called false diarrhea and differs from true diarrhea in that the child maintains a good appetite and gains weight adequately. It is due to an intestinal reflex called gastrocolic reflex that tends to decrease in intensity as solid foods are incorporated. So it is completely normal for it to make feces of that color and consistency. If your child has any other changes such as fever, increased stool frequency, foul-smelling or bloody stools, or abdominal pain as colics, I recommend that you take your child to the nearest doctor for a thorough physical examination and necessary tests and indicate the appropriate treatment if necessary. I hope I have been helpful to you. Regards, Dr. Valentina Romero.