They can be frozen. Depends how long you will have them for. One thing for sure, they all say NOT to remove from original vacuum sealed package. I don't buy the super large packages to avoid this problem even though you save some money. I just figure it into Kathie @ MSBS prices plus 10% off. Having said that, I also use some Goldenobles for one fussy bird here (I won't mention any names here, but her initials are CAG Bella) so those I freeze in a zip lock bag immediately upon opening. They have great ingredients but no preservatives.