https://www.foxnews.com/food-drink/hot-dogs-little-known-facts
Hot dogs are made of meat
Though it seems pretty obvious, Mittenthal said that the most common misconception about hot dogs is “how they’re made and what goes into them.”
“It's a very simple process about how they're made,” Mittenthal added. “Hot dogs are pieces of meat that are cut up very – cut up off of steaks and roasts, they're ground up very finely and they're mixed with spices stuffed into a casing and cooked.”
“It's as simple as that,” Mittenthal said. “All the notions that people have of things that they think go into hot dogs are incorrect. It's simply meat. It's what you see on the ingredients label. If it says beef, if it says pork, if it says poultry. That's what it is. And it's nothing more complicated than that.”