M-44s are spring-loaded devices that eject powdered sodium cyanide to kill the animal that pulls it. They were designed for the purpose of controlling canine predators such as coyotes. Unlike other control devices which require the animal to push (e.g. footholds), M-44s require the animal to bite and pull. When the animal bites and pulls, the sodium cyanide is ejected into the animal’s mouth where it can be absorbed into its system usually resulting in death. It’s the biting and pulling … [Read more...]