Hi I have a quick question. I am going back to work next week and my little one will need to start taking my expressed breast milk. I have a stash of about 100 or so ounces in the freezer that date back over the last 1.5 months. When we start bottle feeding her should I give her thawed milk (oldest first) from the freezer or should I give her the milk I have pumped the day before at work? I don't want my freezer milk to get too old and go bad but I also know if it is better to give her the fresher milk if it is available.