A hot dog is made of the remains of the pig after other parts are cut off and sold as bacon, sausage patties, and ham. However many people across the world eat hot dogs and enjoy them very much. Hot dogs can be boiled, grilled, or fried. The word frankfurter comes from Frankfurt, Germany. This sausage is usually served in a bun or another type of bread. The most common type of hot dogs are made from beef, sometimes mixed with pork. Chicken and vegetarian hot dogs are popular as well. Animal parts are used in most hot dogs, and may include skin, lips, pig snouts, organs, fat, and other parts of animal bodies. Hot dogs and other sausage products were first developed as a way to sell these parts that people would not normally eat. Nearly 20% of the weight of a hot dog is usually non-meat ingredients including water, sugar, and spices. Some legal categories of hot dogs, such as "frankfurters" can contain up to 3.5% of non-meat fillers as well, such as corn meal.