Repair leaky water faucets and keep drain covers tightly fastened. After their food sources are removed, rats are more likely to accept trap or poison bait. However, to prevent dispersal, shelter and nesting places should not be disturbed until all or most of the rats are killed. Traps Use large snap traps when rats have infested a building. Poisoned rats may die inside walls and cause serious odor problems.
Baited traps are one of the most effective methods for killing rats.
Bait traps with peanut butter, bacon or food that rats have been eating. Place traps near nesting areas or where rats are likely to hide. The trap should be placed with the large trigger end facing the wall. It is best to contact a professional exterminator when poison baits are desired. Some poisons require several days of feeding to kill rats and extreme care should be taken to avoid contact by humans or non-target animals.