The mysterious plaster puppy that has been an object of fascination on St. Marks Place is no longer such a mystery — and our original report has been proved incorrect. We were told by neighbors that the establishment would be an icee joint, but now that the awning has been erected, it’s clear this will be a, ahem, hot-dog stand. The pup’s competition, the giant “Eat Me” sign down the road at Crif Dogs, may not stand a chance: Judging from the wiring we noticed coming out of its tail, this dog may just be able to fetch, and smash, bottles in true St. Marks form. Just don’t quote us on that.