China charges the door, growls, barks aggressively whenever someone comes to the porch. She seems so single track on getting out (if the guest is there) or confronting (if already in) that we don't seem to impact her consciousness. We found a clicker got through for a while. I believe her previous owner used it as punishment training but will never know.
She never bites (yet, of course) but this is unacceptable behavior. How would you handle this?