When penning baits for long periods of time, you're going to have to keep them well fed; if you don't, they are going to weaken and start nipping at each other. Some crews choose to hang a chum bag right inside their bait pen, but if the pen sits in any kind of current, most of the food gets washed out of the pen before your baitfish can eat the chum. Also, if the pen is even slightly crowded, the baits can damage themselves by rubbing up against the hanging chum bag. To ensure that all baits remain healthy and well fed, I install a wire mesh chum cage to the inside center of the bait pen's door. I attach it with four or five zip ties. The larger mesh releases a steady stream of food and doesn't take off any scales or snag the baits. The chum cage also makes feeding baits much easier, since you don't have to fish out the nasty, twisted cotton chum bags to refill it every other day.