Kreso-D? Isn't that a floor cleaner?You just have to find something the hogs cannot resist and put it on and under the barrel not in it to teach them to roll it. I used Kreso D, sticky catfish bait, maydenhead fish spray, when the regulars do not work like koolaide and jello dry powder
Just thinking about the difficulty of attaching a chain or cable if you don't have a lug built into the barrel. Just drill a hole large enough to pass the cable or chain through, then thread the cable in. Reach in with a coat hanger and grab the cable, pull it out the bung hole, and attach a piece of pipe, old mower blade, etc, pass it back through the bung hole and your done. I said mower blade because I'm in the lawncare business and have hundreds of them stacked up.