Hi Doctors, My five month old daughter doesn't take her milk properly (direct and expressed milk). She is busy with sucking her thumb or her feet/toe. She doesn't sleep at night and wakes up every two hours or so. Birth weight (19/12/21)- 3.76 kg. She lost around 350 gm in the first two / three days. Current weight 7.8 kg. What is the solution for this issue? And how much milk (in ml) should she be taking everyday?