I get this sometimes

Not just with Mika but with my other two dogs too. If they ask me where they're from I always say that they're mutts "free to good home" out of the paper. It really scares me, esp. when they ask how much they're worth. I think most people like this just have no boundries and were never taught respect, but some may be up to no good so I think it always pays to be wary. You absolutely did the right thing! I just can't believe she just let herself onto your property like that