The ham hock is not exactly a hot dog; a hot dog (hot dog) is a way of eating ham hock. A whole bun or sandwich with a grilled sausage in it is called a hot dog. There's no connection to the animal itself, the dog, it's just a name for the bread.
Hot dogs can be eaten with many kinds of toppings. There are other variations of hot dogs. Those with cheese are called "cheese dogs" or just "cheese dogs". Those with chili are called "chili dogs". A dog with all of the first two is called a chili dog. A deep-fried hot dog coated in corn syrup and served on a small bamboo stick is called a corn dog.
Expanded information: The Evolution of the Hot Dog By 1906, the long, slender, streamlined sausage was still a novelty in the United States, and was called variously There were various names for them, such as "Frankfurter sausage", "Frank's sausage", "Vienna sausage", "little red sausage", and "DeShields sausage". and "Dreschen Dog Sausage". The name "Dechsin Dog" refers to a long-bodied, short-legged brindle dog, and is named after the shape of the sausage, which resembles the shape of this breed of dog. During this period, Harry Stevens, who acquired the snack registry, marketed his Deschutes Dog sausage buns to New York baseball stadiums, where they became a popular food item. Experts believe that Dorgan is credited with coining the term "hot dog," but to this day, I don't know how many times I've looked through the collection of paintings, but I can't find the caricature that is falsely written as a "hot dog," but only interesting stories about the caricature have been circulated. Especially amazing is that Americans consume 19 billion hot dogs a year, 90 per capita, worth 500 million dollars, eaten hot dogs spread on the equator, can circle the earth 26 times. Baidu Encyclopedia - Hot Dogs