Call of Duty Dog - Image #834,032

Incidentally, Space Invaders for the Arcade featured moving objects. As the characters and Objects, even Vehicles, in MGS V are clearly moving too, i think we can all agree that some one should sue Hideo for this obvious rip-of.

Actually military dogs have been in service as far as World War I if not further back. Dogs were used to detect Mustard Gas before the fumes became fatally thick, help drag wounded soldiers away from the battlefield, and even detect enemy tunneling attempts as part of trench warfare.