Make sure she has lots of things to occupy her when she is in the kennel.

Have you thought of putting a dog gate just inside the front door so if it is left open she still can't get out. I used to do that with my Patterdale (aren't they great dogs ). There was enough space to open the door but Tobey had to stay behind his gate to watch what was going on - now he just responds to the word "stay" but we are still vigilant about the door being opened