[Chicagocanine]

Bianca would bark at the door/fence even if it was someone she knew. No one was brave enough to try to come in with her barking at them, they waited for me to open it and get her to back off.
So I don't know what she would have done if someone actually came in without permission, if she would have just kept barking (I think that at least) or if she'd have done anything further than that.