Rearranged woodpile?

We got home last night from wine tasting in Missoula, and I noticed that some pieces from the woodpile by the fence had been moved. That's weird, I thought. Given that we've had skunks around, and rumors of a bear and lots of deer, I started racking my brain trying to come up with some logical explanation of how any of those animals (or perhaps our cats or dogs) could have moved the wood in this manner.

We walked over to the wood and took a closer, puzzled look. Pretty quickly it became clear that this was one smart animal, since the wood was moved in a very precise way. We looked and looked, and the meaning eventually became clear.

Check out the pictures here