A field dressing tool for big game animals and a method for using same is disclosed. The tool includes a tip portion, a plurality of barbs extending radially and rearwardly from the tip portion, a shank extending from a rear portion of the barbs, and the handle on the shank opposite the tip portion. A barrier member is provided between the tip portion and the handle, and is positioned in a spaced-apart relationship with the handle. Inserting the tip and barbs into the rectum causes radial stretching of the intestinal wall, and rotation of the tool causes ensnarement of the rectum on the barbs. The tool is retracted from the anus, pulling a section of rectum external to the animal to be closed to prevent leakage of bodily waste materials.