I am no expert by any means as I am new to chicken keeping and looking forward to building my coop. I have read in several blogs about raccoons reaching through chain link fencing as well as chewing/breaking through chicken wire. Most people suggest 1" hardware fabric for your coop as well as having an apron at least 2 feet out from the base of the coop to discourage digging predators. I hope to build mine with cinder blocks base, 2 layers, with the 1/2" hardware cloth spread out to cover the entire 'floor' of the coop and run with an apron between the layers as well as another apron 2 ft out from the block base top layer. I will be in an area where raccoons are present and possibly snakes. I hope to build a fortress to keep them all out and keep my girls safe. My girls have a temporary coop for now as I am moving in 4 weeks and the new home will have their permanent coop. I also thought about plastic lattice, 4 ft wide, buried 2 feet below ground and 2 feet above ground screwed to a 4X4 base for a decorative border around their coop as well as lining the bottom of the coop and run with the hardware cloth. I have seen several not so nice pics where raccoons have gotten to someone's chickens and it wasn't pretty. I would hate for my granddaughters to have to see something like that when they go out to collect eggs.