Dog Behavior: Why is Callie Scratching Her Crate? Video

Every once in a while, Callie Golden Retriever goes into her crate -- either at home or at Lake Arrowhead -- and scratches the floor for a few minutes. I have no idea why she does it. A few of the trainers and animal behaviorists who have been guests on the "My Doggie Says..." radio talk show have suggested that she's doing what she would do in the forest -- preparing a nice "nest" for herself. Maybe it's this simple. It makes sense, but it sure is weird to see her do it. This video was taken in very low light, but you'll get the idea: Notice how Callie turns toward me, as if to say, "So what's your problem?" Then she lies down to go to sleep.