Needs no refrigeration.  Fish these sides for channel cat.  For a deadly combination when fishing for catfish, dip shad sides in Rust's Sponge Bait.  As this bait ages and matures, it will form a brown liquid shad oil in the bag and a tronger fish smell.  It may also turn milky or develop white specks.  These processes are natural and in no way alter the effectiveness on the bait.  The more age on the bait the better it catches fish.