We had to put some sort of retaining wall around the the chicken coop since we dug away so much dirt. And we had a ton of big rocks and stones all over the yard. We put the two together, and voila!
Next year when it gets warm again I hope to plant some trailing ground cover in the little patch of dirt there between the gravel surrounding the coop and the rock wall. Of course, in the end it will all look like dirt anyway since those chickens love scratching and kick dirt all over the place!