I am using block feeding to deal with an issue of overabundant supply. Prior to each feeding I pump from each breast: from the feeding breast in order to drain some foremilk prior to the feeding, and just enough from the unused breast in order to relieve discomfort. Is this milk usable? I've read a great deal about the gradual shift from foremilk to hindmilk, but it seems to me that the milk I pump must be comprised almost entirely of foremilk. Does this mean that I should not use it for bottle feedings? Any advice is much appreciated!