Freezer could add humidity/frost, If it is in cans rust would be an issue. It does not magically go bad at 25 years either. A lot depends on environment. Worst case chicken feed.
Discussion
I think mylar bags should prevent water incursion
Freezer could add humidity/frost, If it is in cans rust would be an issue. It does not magically go bad at 25 years either. A lot depends on environment. Worst case chicken feed.
I think mylar bags should prevent water incursion