I have a ton of frozen BM b/c I pumped alot right after DD was born thinking I was going back to work part time like I did with my son and I never could build up a stash with him and it always stressed me out. Now that DD is 7 months old I am going to go into work for a few hrs a couple of days a week so I thought we could use some of the frozen BM. Its been stored in a deep freeze and has been the only thing in there so the lid is not opened very often. Anyway I went to organize it all today so I could use the oldest stuff and it looked funny. Some of the first bags actually had a little ice crystals in them (the ones I stored before I figured out to store it flat) Some of the flat ones have little white spots through them, so I cant tell if thats just part of the milk or something is wrong with them. Is there anyway to be able to tell before they are thawed? I was planning on donating some also but dont want to donate milk that isnt any good. Oh and they are all stored in lansinoh bags. I have about 300oz so any info would be appreciated as I really do no want to throw all that away.