I keep reading all the horror stories here about their flocks being killed by various predators. Now I'm worried about if my flock will be safe. My coop is built on a concrete slab, so digging under wont be a problem. The walls are built out of OSB and 2x4s, The OSB has weathered a few years so its not in the best shape. I am how ever in the process of adding vinyl siding over the OSB, How much of a barrier vinyl siding is I don't know. Inside the coop I have wood planks running along the floor, and then I have 4x8 sheets of hardboard 1/4 inch thick. To get into the coop you have to go through the main barn, there is no outside access to the coop. Now how to seal the door. There is about 1 inch gap from the door to the concrete. I plan on locking the pop door every night, and making sure the inside door in secure. But the question is am I doing everything to keep unwanted out? I suppose something could always chew through the wall, but how long would it take to get through vinyl siding, 1/2 OSB, fiberglass insulation, 1/4 hard board. I would hope what ever did it would be full by that time and wouldn't want the chickens. Am I being too paranoid?