Big Cheese Rat Killer Grain Plain Bag Bait Sachet. Ready-for-use bait for the control of rats in and around buildings. To be used in tamper resistant bait stations. Highly palatable chew-thru bait packs for use in and around buildings. Pre-measured and ready to place inside a bait station. No need to touch the bait. Advanced formula kills mice. With 50% less poison.* This advanced formula has been specially designed with the highest quality food materials, flavours and preservatives to create a highly palatable bait that kills rodents in just a few feeds. The Big Cheese Home Choice range provides proven and effective control of rats and mice *using 50% less poison than previous formulations, making it the ideal choice for use in and around the home.