Bait in enclosed bait boxes designed to only let rodents in. Or (provided you don't have chicks/very tiny bantams) I have safely used snap traps around the chickens, but I use bricks to wall them in and scrap wood weighed down with bricks to function as a "roof." That forms a chicken proof enclosure for the traps, with a couple gaps maybe 1-2" wide for the rats/mice to get in.Anyone have good suggestions for a chicken safe mouse trap? I let my girls rule the whole yard, so need one that won't injure or harm the girls. Mice have been digging around their run- coop. Not into the live, humane trap and release type. Sorry to offend anyone who might be.