Sometimes Vladi gets the top perch and sometimes Josie gets it. Josie is getting more comfortable around Vladi and Kaj. She has the run of the house now during the day when we're around to supervise. So far there haven't been any real issues. :-)
This pic was actually from a video I made of Josie and Vladi interacting. I used the "snapshot" button in Picasa to grab the still shot.