I built my predator proof hen house in 2003 from chain link gates and driveway gates I'd scavenged the preceding year before driving back to Denver for my final summer there.....they'd been set out curbside at two homes for our annual Large Item Pickup day. It has been through many hurricanes. I lost a few birds that first year, but a few minor modifications resulted in no predator fatalities in years. 100% free, lashed together with scavenged insulated wire. Now long covered by grape vines.