Let’s skip wondering about the folk and true etymnologies of “hot dog”, and jump right into bright ideas of what other canine foods there could be.
Put an egg in a hot dog, and it’s a hot platypus.
Have three sausages instead of one, and it’s a warm cerberos. Have a real tiny bun and a very small but spicy sausage, and it’s a hot chihuahua, or even a hot chilihuahua. Stuff the bun with cotton candy, too, and it’s a poodle fry.
Put a handful of meatballs in a calzone, and it’s a kitten holocaust… what do you mean, that was too much? Would it be better if I called it a canine hecatomb?
How about a sausage in a cone-shaped bun, in a “well” of sorts — Lassie’s end.
Instead of one sausage, pieces from three different ones, a cheap, decent and deluxe one, going from one end of the sausage to the other: Darwin’s rottweiler… on fire! And going on with rowdy dogs, put in steak instead of a sausage, and it’s a fire pit bull.
Like George Carlin said, “I’ve got lots of good ideas! Problem is, most of them suck.”