Hello, Welcome to HCM. I understand your concern. Pus in stool may be due to dysentery, malabsorption or eating diet rich in fats. Does she have fever, abdominal pain or vomiting? If yes, then infection due to shigella or amoebic dysentery can be there. She should be given antibiotics so you should visit your pediatrician. In absence of these symptoms, it can be due to malabsorption or high fat diet. Is she taking more amount of butter, cheese, cream, oil etc recently? If yes then reduce the amount & see if the symptoms persist? Hope this will be helpful. Take care.