 Most "Wurst" is made with natural casings of pork, sheep or lamb intestines.Among the most popular and most common are "Bratwurst", usually made of ground pork and spices, the "Wiener" (Viennese), which may be pork or beef and is smoked and fully cooked in a water bath, and "Blutwurst" (blood sausage) or "Schwarzwurst" (black sausage) made from blood (often of pigs or geese).Thousands of types of cold cuts also are available which are also called "Wurst" in German.