Has anyone tried this feed? My feed store will only sell it in whole bags and with just 2 hens Iʻm reluctant to buy an entire bag. I was always told to refrigerate ground flax seed because the oil goes rancid so quickly. Has anyone had trouble with it going bad before they can use it up? I live in Hawaii and Iʻm always worried about pests getting into things, although I guess with chicken feed that should just add extra protein?