All I could see was the nose! Yep. we're big dog lovers here also, and I mean big dogs, as in large LOL! My German Shepard stands about 23 inches at his shoulders. He can easily lay his nose on a table LOL!
Here's my advice. You have to make that area around the skirting as uncomfy as possible! Since you live in Utah, right next to me in Nevada, why not use some course, large gravel in that area.
Yanita's correct, the metal siding is a DIY project made of corrugated metal. It's a lot of work, but it's the best, solid skirting around!
Bottom line, make that area the least inviting to the dog as possible. She'll find another favorite area!
Never discourage anyone...who continually makes progress, no matter how slow.