Ok, so the chicken tractor we just built is pretty cool...but I'm concerned that this summer the coop part- which is about 3.5 ft over top of the run area, will heat up too much this summer. It's 7 ft long and 3 ft wide at the base, tapering up to a roof. Has a nesting box at each end and some roosts Made from pine Should I put in some venting? or maybe a small fan? You may need more info to help me out... thanks!