In Tuscany, they make a dish called collo di papero ripieno, similar to the famous stuffed goose neck of Périgord (cou d'oie farci): a duck's neck is filled with a mix of duck and chicken livers, egg, breadcrumb, and cheese, then tied up like a sausage and boiled, and served cold in slices.
There's also chicken neck version, collo di pollo ripieno, popular in the Mugello region of Tuscany.
Image by Soham Banerjee