Landowners and hunters should agree on arrangements that will be mutually satisfactory and that will avoid unsafe shooting practices. Make every effort to use the carcass. A young medium-sized groundhog makes excellent table fare if properly prepared. Gas cartridges, which produce a fumigating gas when burned, may be used in dens by property owners. These cartridges produce carbon monoxide gas, which accumulates in lethal amounts when confined within the burrow system.
Carbon monoxide is a humane fumigating gas.
Gas cartridges are filled with combustible materials and must be ignited by lighting the fuse. They are not bombs and will not explode if properly prepared and used. Avoid prolonged breathing of smoke. Sparks may be thrown, so do not use near buildings or other combustible materials. Insert fuse to half its length into one of the holes.