I have recently started mixing bottle and breast. my 4 month old LO who has slept through since 9 weeks has now started waking every night for a feed. I had forgotten how it felt!! how do I get her to take more in the day so she doesn't need to wake up? I breastfeed her first and last but have tried formula last thing too. she doesn't always take full bottles in the day how can I persuade her to?