How did hot dogs develop into a popular food

Summer, in many people's minds, is a time of barbecues and picnics. One common food in this is the hot dog, which is often grilled and served in a bun. The history of the hot dog goes to ancient periods, when sausages developed as a popular food. Modern hot dogs are a result of efficient use of meat remains after the processing of meat products. The history of the hot dog is often seen or attributed to German origins but even here there is dispute about this.