I just moved into a new place and whenever I leave Bambi alone there she cries, barks and screams (even if I just leave to take out the trash) whereas in the previous place, she would just watch me leave and would stay quiet. Now, if she hears my keys or sees me put my shoes on, she runs and sits in front of the door waiting for it to open. This morning, she ran out and down the stairs and I had to run to get her. How can I get her to not cry when I leave her? And, how can I teach her not to run out because I live in an open air apartment and she's a fast little pup, and I am scared she will run out into the street because Bambi simply does not respond to her name when she is on a mission.