I need help. I'm new to raising chickens and I don't know if I should have a screen top on the run or totally cover it. I am thinking about using the corrugated rooffing because that way the area is protected from rain and predators but wondering what the cons might be. I can think of evenually the area will no longer have grass for the chickens. But maybe that is ok as I see many people use sand and other types of flooring. Many of the runs you see on the web sites are just screened in, but I was worried about the mess when it rains. I live in Florida and we have quite a bit of a rainy season in the summer and I would hate that the chickens have to be in the coop for other than sleeping. I need protection from cats and raccoons climbing into the run, so not sure if Tarps are good option.