はい ttp://dwarffortresswiki.org/index.php/v0.31:Activity_zone >Creatures can be assigned to a pit/pond through the P menu. >A dwarf will lead the beast to the ramp or hole and throw it in. >If the pit is a ramp rather than a hole, the creature will then wander back out, >as it will if the pit has some other exit path (which would include straight back up the hole for flying creatures).