Rat poison, also known as rodenticide, is a chemical used to kill rats and mice. The most common type of rat poison used today is anticoagulant rodenticides, which work by interfering with the blood-clotting ability of rodents. When rats consume rat poison, their blood-clotting ability begins to fail, and they slowly die from internal bleeding, or they become more susceptible to severe consequences and even death from minor injuries like cuts and bruises. It can take as long as 10 days for a rodent to die after consuming rodenticides.

However, the use of rat poison can have devastating effects on other wildlife, as rats and mice that have consumed the rodenticide can be eaten by predators in the ecosystem, leading to secondary poisoning of other animals. Even the carcasses of animals that have died from rat poison can be eaten by other animals looking for a meal, allowing the rodenticide to move its way up the food chain.

It is important to note that rat poison is incredibly toxic to people and animals, including other household pets, if consumed. All rodenticides should be kept out of reach of children and pets, whether they are in use or storage. If you are dealing with rodent problems in your home or property, it is best to consult with a professional before using bait indoors.