I hve found dozens as I hunt trails and tracks where folks walk their dogs. Like you, nearly all of the people I call don't want them back! Many have said their pets passed away since losing the tags... Happy Hunting, Sub
Its funny that the owner basically gave you a green light to throw it away, but as treasure hunters we put them into a display case proud to show them off ! At least thats what I have done with all of the ones I have ever dug.