There is a waterproof PVC cover across the nesting box roof edge to prevent water from getting into the box. And upgrade secure latch to lock the nesting box so the predators cannot open it. 2, During the night, secure the tray with an extra latch to prevent predators from attacking your chickens.3, The wooden doors open up&down in the run, and the main house. And you can install an automatic chicken door opener (as seen in the picture) so that you can open and close the door at any time. (Pls note that no automatic door opener is included).