Yeah, someones missing their puppy. The pound would be one of my first calls if my pet was missing, so don't remove that from the equation. You can always ask for it back if unclaimed probably with expenses though.
Christmas Eve, just as the inlaws drive up at dusk from Az, this huge Aki/Husky sled dog type just show up at our back gate. The inlaws brought their fox terrier and we have our fox terrier and this 100+ lb strange dog is really out of place here. The dog is beautifully kept and wearing a big red collar, with no ID on it.
Our street is busy and 200 yards away is a 45 mph main road, so I put the dog in our fenced yard, and put our two mutts in the house, then grabbed a flashlight and walked a few miles around the neighborhood looking for an open gate with no luck. I made a "dog found" poster and stuck in our front yard, put a leash on the dog/horse hoping he would drag me back to his house. We turned one corner and luckily his owner drove up and was profusely thankful. The owner said his daughter had accidently removed the dog tags just the day before.
I was so relieved that we didn't have to deal with that dog with our dogs, heavy rains and holidays all mixed together. It may have been 2-3 days before the pound even repsonded. I think I was more thankful than the dog's owner that he got him back.