What kills mice quickly?

What kills mice quickly in a home pest control context is a mechanical trap designed for instant kill rather than poison which takes days. The classic snap trap with a strong spring bar kills mice within seconds by breaking the neck or spine when the mouse triggers the bait plate, and modern versions with larger trigger plates are more effective and humane when placed correctly perpendicular to walls. Electronic traps that deliver a high-voltage shock also kill very quickly, usually within a few seconds, by causing cardiac arrest, and they are marketed as quick kill and allow no-touch disposal. Both types are considered quicker and more humane than glue traps which cause prolonged suffering and do not kill quickly, and quicker than anticoagulant poisons which take 24 hours to several days to cause death through internal bleeding and can cause mice to die hidden inside walls creating odor problems. To ensure a quick kill, use traps that are labeled as quick kill or humane kill, bait with a pea-sized amount of peanut butter or chocolate, place many traps at once along walls where droppings are found, and check them daily. For large infestations, a licensed pest control professional can provide commercial grade quick kill trapping and exclusion that is faster and safer than homemade methods.