Yes but really think that it just escaped from its kidnappers
Quite a few, over the years. Not my "pets" usually, but other people's who were lost. Never in quite the situation your image portrays, though. ;)
Yup, a neighbors' dog got away from the doggy sitter and was last seen headed to my back yard.. and I spotting him.
Yes, it was one of those weiner dogs.
Yes, many times.