The taste of balut is similar to chicken soup. Another simple method is as a by-product of the making of chicken soup. In Mexico, they are eaten with rice or with chicken soup. There have been numerous volumes of "Chicken Soup" issued. The rooster on the chicken soup became a symbol in Yugoslavia. Chicken feet are commonly used as a main or supplementary ingredient in chicken soup. Kogel mogel is ranked highly among other traditional cold remedies such as chicken soup. They are used in the chicken soup "tinola". In Hungary a popular kind of chicken soup is flavored with tarragon. It is a common flavoring, additive or main component of chicken soup. Heart, liver and gizzards of chicken are a traditional part of chicken soup. Other variants are Chicken Egg Soup and Simple Chicken Soup. "I have actually taken a human life with my chicken soup," Mary laments. Canfield later co-authored dozens of additional books in the "Chicken Soup for the Soul" series. Another type of chicken soup in Ukraine includes chicken, noodles, carrot, potato and onion.