Last week I had a couple of neighborhood pit bulls pull the roof off my chicken coop and kill all my chickens. The roof was screwed on, hard, white plastic sheets, which they couldn't get off, so when they pulled, the rafters, which had been nailed on pulled out (mind you, I don't think I could have accomplished this without the help of a crow bar). I'm going to screw everything together this time. But other than using screws instead of nails, does anyone have suggestions for dog proofing the coop? (just as a note, we are both suing the neighbor - this is the 3rd time their dogs have killed our chickens because they won't keep the dogs locked up. and we are working with Animal Services to get the dogs taken away. But in the mean time, I would like to start more chicks, to replace our lost flock).