Dear Lactnet: I had a call from a mother whose milk which was pumped at three months postpartum and stored approximately 1 month has a "chemically fishy smell". It is also darker in color than her other milk ( she has about 40 bags saved) She is freezing in 3mm polyethylene bags. she describes herself as "anal" in her pumping storing and heating routines. Her questions are: what is the smell from? what can she do to prevent its occuring again? is the milk harmful? thank you, Patricia