goose-the hoochie mama is great. so are the other primos diaphragm calls. Their video, mastering the art is a great way to learn, youll be able to use either (hoochie mama or diaphragm)by the time the video is over. The hoochie mama has different settings for lost cow, calf, estrus cow. its really easy to use, estrus cow brings bulls(souinds like a cow ready to breed), the other two bring cows.... although there are no RULES for elk.