It's kinda sad that soo many people loose beloved chickens to predators and pest. I have come up with a few ideas on how to keep the pest and predators out. 1. Get some tight mesh, around 2.5 cm wide/long for each hole/square. 2. Build a big coop that has multiple rooms which are up high. 3. Build a moat around your coop (yes, like castles) so cats and stuff don't want to go near your coop. 4. Install a sensor light into the coop so everytime a predator comes, the motion will trigger the light, so the chickens have a chance of keeping out of the way. 5. Put a wall right next to the mesh, around 10cm long, so snakes can't get in and raccoons etc, cant reach inside. Hope this helps.