Poo that is stool, month baby that is the newborn, newborn mixed feeding, eat once a poop, may be a normal phenomenon, but may also be due to indigestion, gastroenteritis, lactose intolerance and other reasons. 1. Normal phenomenon: newborns mixed feeding eat once a poop, if the mental state is relatively good, normal urine, good condition of milk, and normal weight gain is also a normal phenomenon. 2. indigestion: for newborns, gastrointestinal motility is relatively poor, when eating too much, it may lead to indigestion, there may be an increase in the number of stool phenomenon, manifested in the symptoms of eating a pull. 3. Gastroenteritis: Because the resistance of newborns is relatively poor, it is easy to lead to gastrointestinal infections, causing gastrointestinal inflammation and increased stools. 4. Lactose intolerance: some newborns due to congenital lack of lactase milk may appear lactose intolerance phenomenon, resulting in increased stools, manifested in eating a pulling a symptom. The newborn appeared mixed feeding, eat a time to pull a stool symptoms, it is recommended to go to the hospital in a timely manner, in the doctor’s interview according to the newborn’s specific situation and related items check, determine the cause of the disease after targeted treatment.