Coop is inside a barn, will have a tunnel for them to get to an outside pen. We do not plan on locking them up at night once they understand to go to the coop at night, so it all needs to be secure. Hardware cloth for the entire outside pen, including the top? Walls of the coop are metal, wood, and then the top 1/2 of 2 walls will be hc. Tunnel we are still figuring out. We want to do what will keep them safe from coyotes, fox, raccoon, stray dogs, hawks, etc. We don't want to break the bank where it isn't needed though. Thoughts? Thank you!