Two stop motion animated caveman comedies. In Prehistoric Poultry, A caveman falls victim to a prehistoric prankster, but he is avenged by his pet chicken. In RFD 10000 BC, two prehistoric suitors—one a mailman—compete for the affections of a prehistoric maiden and a dinosaur. Both films directed by Willis H. O'Brien, the special effects artist behind The Lost World (1925) and King Kong (1933).