What's wrong with this picture?

Well, this is Molly. She is our newest dog. We got her when she was about 9 months old. Now she is almost 2. Our entire backyard is fenced in so she has about an acre in which to run. You can see our grate which opens into the back yard in this picture, right beside where Molly is sitting.

The only problem is that she is on the OUTSIDE of the fence! We can't keep her in. She keeps digging her way under the fence. We have tried wire along the bottom of the fence, pounding steel rods into the holes she digs, and even put barbed wire along the bottom. What drives me the craziest is that when she gets out, she runs to the gate wanting back in! She can get out, but she can't get back in.

She sure is cute though and I love her.