Is it ok to combine expressed milk from different days that is frozen?? For example, if I have a bag of 2oz from one day and a bag of 1oz from a few days later can I just thaw them (either in fridge or under warm water and dump them together in same bottle to get 3oz???
And if I thaw both bags and do combine them together and he only takes 2 of the 3oz, can I put the remaining 1oz left in the bottle in the refrigerator and use that to top off either freshly expressed or frozen milk??