It would depend on how the dog looks. If it looks healthy and like its not missing any meals then it is probably somebody's pet on a walk about. If its scraggly and skinny its probably going down.
Side note: One of the biggest deer I've ever seen came by me in 5th gear about 40 yards in front of a neighboring land owners bird dog a couple of years ago. Would have loved to shoot the deer but there's no way I would shoot one of her dogs.
