Today I set out to the mall with the goal of NIP for the first time. I brought with me a bottle of EBM for backup, although it was not needed. Yeah!! Success with NIP!! However, when I got home and pulled out the EBM there was milk stuff along the top inside of the bottle above the milk line. It looks like a cross between fat that has separated and curdled milk. It smells completely fine and it was only out of the fridge for 3 hours and was pumped two days ago. I did not warm the milk prior to going out. Does anyone know what it might be? I hate to throw away EBM (that bottle is the equivalent of 4 pumping sessions) but I certainly do not want to give dd something that has gone bad.