hello sir , my baby is 4 weeks old....is it ok mix breast feed and formula milk ( nan pro ). also my wife is not able to completely breastfeed the baby... can weuse of breast pump help her in order to feed the baby.....also any side effects of using breast pump ? i want to give mother's milk to my baby but baby has developed habbit of drinking top feed and he is not latching properly on his mother continuosly.... can you please suggests ways how we can improve his latching..we tried feeding him every 2-3 hrs but he gets cranky...kindly help...