my baby appetite is decrease some days before she drinks 5-6 bottles of milk 150 ml.before4-5 days she has a cough and nose block.then she suffers fever before 2 days.now she is well but her appetite is decrease she take only 4 bottle 90ml.what can I do.her wait is only 5.7kg is it normal??she is 4 months old.and her hair fall increase.