coyote getters are a .38 casing with only the primer left in for a propellant. The casing is filled with cyanide with a drop of wax on the end to keep the poison in place. It is placed on a device that has a trigger and a fireing pin. Scent is then applied to wool or just a rag,and this is attached to the trigger.This is all placed in the ground with only the wool/rag and the end of the shell caseing above ground. When the coyote pulls on the scent rag it triggers the primer and shoots the cyanide down its throat. The animal may travel 25 yards. All repetive poisons are now illegal for a.d.c. work by fed.law. It was,in my expearence the most effencent tool I ever saw for controling coyotes. You had to be extreamly carfull where you set these things as what ever pulled on that scent rag died. Because it was not entirely species selective it's use was banned some 25 years ago. I don't know of any agency that uses such a device today.M-44 might be the same thing,it does sound as though it is.I only knew as a getter.