Copdock Mill — Quality Since 1912. Copdock Mill was founded in 1912, starting life as a country mill. Simply add the wild bird seed mix to your feeder and hang out for the wild birds to enjoy. 100% NATURAL INGREDIENTS — we use the finest natural ingredients in our wild bird food, including protein-rich peanut granules, white millet, cut and flakes maize, wheat and black sunflower.