We're (STILL) planning our smallish almost-a-chicken-tractor-type coop. Dh likes the look of the runs w/roofs on them. I'd just as soon leave the roof off and put wire over the top. It won't be as heavy for occassional moving. The run will be in the shade from trees all afternoon and evening during the summer. We have a tarp that we could use for a cover in extra wet weather. So is there any other reason we'd want a whole roof on the run?