The person who posted this sign was actually looking for a lost dachshund, the breed of dog commonly said to be shaped like a hot dog. No one was looking for a Datsun automobile.
This reminds me of an especially gross college cafeteria memory. I took a bite out of a hot dog and put it down on a plate. A friend sitting across from me suddenly had an uncomfortable, rictus-like smile on his face. “I don’t know if I should tell you this,” he uttered, beginning a sentence that inevitably needed follow-up. “There’s a vein sticking out of that hot dog.” Sure enough, I looked at the hot dog and a bright red vein sat there, clear as day. I guess I had just bitten into it. Too bad this sign did not spell this as VEINILLA.