The coops are solid - in fact they’re far stronger than the conventional wooden coops sold here. There’s no way a Fox could eat or get in my coop! Door handles are robust. When everything is locked up, ie the walk in run that then leads off to the coop a fox cannot even tunnel in as there is a skirt firmly secured around the whole thing. I have an electric fence as the final protection as the hens spend most of their time outside the walk-in run. If I’m going to be late home I bribe them into the walk in run and lock it closed. When I return I simply have to close the coop door, but I always say night,nights!