Farnam Just One Bite EX Pellet Place Packs 88ct These Chunks Kill House Mice, Norway Rats and Roof Rats In Stables, Barns and Storage Formula Contains The Active Ingredient Bromethalin To Stop Feed Action, Rodents Cease Feeding After Consuming A Toxic Dose Norway Rats and House Mice Usually Consume A Lethal Dose In A Single Nights Feeding Product Comes In A 4 Lb. Pail