I'll bet that she doesn't bark once you are truly gone. If you had a tape recorder, you could find out. It wouldn't have to run for the length of time that you're out, just a while.
Generally, it's exactly how you imagine. They bark as you are leaving, settle down for a nap, they wake up to the familiar sound of your car coming home, and start barking again.
Yes, it sounds like some basics are in order with Arwen.
Do you think that Arwen would steal as many toys as Aragorn gets, or would getting another dinosaur help?
Love All Life, Thank You For Posting! :)