Trapping is very effective and rewarding, but time consuming to stay on top of your bait and removing dead rats. I prefer to bait and be done with it if you can handle the temporary smell of dead rodents. Pick up any of the bait chunks by Motomco at your local ag store. Any with bromethalin as an active ingredient will be good because it will knock them down pretty quickly as compared to the older Decon anticoagulant baits. When we owned a farm with lots of grain for feed I learned from some pest control old timers to rotate baits every six months so that the rats and mice that wisen up to one will get taken off guard by your new offering you out out for them.