Since when your baby having this issue?? If suddenly gets  more watery stools  and it's  happens more often  in large amounts, it may be due to  diarrhea..

If child is only on breastmilk then nothing to worry but if you are giving milk from outside then you need to check as buffalo milk is heavy and you should check containers.

Nothing can be advised depending on the information you have provided. Which milk are you giving to the baby? Is he breast feeding ? Is he taking any other food than breast milk or other milk? If milk is new addition to the diet, may be baby is not able to tolerate the milk. There are proper ways to start the external milk in case breast feeding is not possible. Please take proper online or offline consult to get apropriate advice

Give medicine to mother Mother milk is giving baby loose motions Find out root cause of problem Correct it by ayurvediy medicine Use balguti chart medicine for baby