I had a sign that used to hang on my door that said "Please wipe you paws" next to a picture of a Yorkie. But I took it down after all of the Yorkie thefts that I was reading up on.
However, I do have a "My Yorkie Is Smarter Than You Honor Student" magnet on the back of my car!

Figure I give someone credit that attempts to mess with me, my car, or my Monkey Man.