The idea of owning a pet is really funny. I saw an advertisement for, "certified pre-owned dogs." The parallel to that would be pre-owned vehicles, which of course used to be called "used." So those pets could just as easily be called "used pets." I've always thought instead of calling used cars "pre-owned," we could call them "pre-depreciated" or "pre-worn and torn." "Pre-depreciated, pre-worn and torn dogs" -- that's what my advertisement will say.