Kills roof rats, house mice, meadow voles*, and warfarin-resistant Norway rats Norway rats and house mice may consume a lethal dose in a single night?s feeding Contains the active ingredient bromadiolone, a second-generation anticoagulant that causes internal bleeding Palatable formula with grains and seeds Features nibble ridges to promote rat and house mouse chewing Individually wrapped to maintain freshness Bars can be broken down into smaller pieces for multiple placement Available in 8-pound boxes containing 8 individually wrapped 1-pound bars