Hi What is the best way to store flax? I have always only bought it in large size baggies but the feed store has stopped packaging it like that and now only sells it in 50 lb bags. It is whole flax not ground. Will it just keep in my grain bin or should it be frozen or something? How long will it keep if just stored like regular feed? I only use about a cup a day for my horses so a 50 lb bag is going to last forever.