Japanese publisher Square Enix has announced a new feature in the next update to its massively multiplayer online role-playing game Final Fantasy XI. "The development team has finally addressed everyone's requests for a system to raise their own personal Chocobos," the company announced, referring to the Ostrich-like creatures players can use as mounts in the game.Chocobo fever!Players will have to spend one to three months raising their Chocobos from an egg, each of which will be genetically unique. If not cared for properly, Hatchlings can die. Once players' Chocobos are grown, they can be mated with other players' Chocobos.