J.L.
Hi T.,
I, too, have had the same problem. I stored my breastmilk in the deep freezer for about 2 months and got the same fishy smell with all of the bags of milk. Since I froze it correctly, in breast storage bags and under the allotted amount of storage time, I tried to feed it to my son anyway. He took one sniff and would not drink it. So, unfortunately, I threw all of it away--such a waste! I think I'd take the other Mom's suggestion to try the Avent bags--maybe the thicker bags would help.
Good luck!