I am planning to use sand for underneath my coop (raised coop) and run. We live in Ohio and my yard is a swampy mess right now. I am planning on rolling the area flat (with roller that goes behind tractor) and then I was thinking of laying down landscape fabric before I put the sand down. The reason I am thinking of this is that I want to surround the outside of coop/run with about six-eight inches wide of gravel to prevent digging predators and for looks and I was planning on putting fabric under the gravel to prevent weeds. My concern with several inches of sand will my hens dig down to the fabric and pull it up? Will it create a smell problem? Any advice appreciated!