We're in the process of putting our run together and I'm wondering if anyone has used a regular old aluminum framed screen door on their run? Our coop is inside the run, which is fully enclosed on all sides, and the top is clear plastic roofing. Our intention is to build the run predator proof enough that we don't have to close the door to the coop itself every night. Will a screen door, with a strong additional latch perhaps - work, or is it not predator proof enough? Any experience with this? Thanks!