My heart goes out to you and your Shepard. My dtr had a Huskie Malmute mix that was the same way. We called her Reggie Houdini, she always ate her way out of where ever you put her when she was home alone. The vet told her it was separation anxiety. She was fine when someone was home with her, but hated being
Home Alone You've received alot of good advice, hope all works out for both of you. I was hooked on German Shepards before I got hooked on Yorkies.

Good Luck!