Hope this is in the right place. We recently sectioned off an area of our back lawn with a run for our dog. At the moment with all the rain, and with all the trampling around making the run, it has gone all mucky inside where the dog will be. What could I put down to keep it some bit clean, and easy to maintain? Also, something that might deter him from digging. Concrete is not an option as I want it lawned again in the future. Sand, sawdust, bark? Anyone any suggestions?