I have 4 coops with large outdoor runs attached. The coops are nice, large and dry but my outside runs are a muddy mess, we have had alot of rain and they are really muddy. I hate to see the chickens in this mess. All of my new coops and runs have a roof over them, and this works so much better, I wish my old runs had roofs but the way they are designed it would just be to hard to do. Anyway a friend told me to put small gravel in the runs and it would help, we live close to a quarry so I could easily do this, but my husband says it will not help at all. Anybody tried this?