I haven't built my coop and run yet, but I want to share a story from a neighbor that I found very surprising and now I don't know what to do with the information. It may or may not be useful here. I inherited a whole bunch of welded wire fencing panels from a neighbor who no longer keeps chickens. She bragged about how she built a Fort Knox with these panels, and in the 16 years she kept chickens, she never had any predator issues, even though she lives on the edge of the woods and would leave the coop's pop door open year round, day and night. I was seriously impressed by this, and was happy to take all her fencing panels (secure! and free! the best combination!). That was before I started reading through BYC and learned that the openings have to be quite small for the run/coop to be considered "safe"... I went back to my new panels and measured them. Their holes are... 2x2 inches... 
So, I guess this could be good news or bad news. Good news that you can still have a "Fort Knox" even without killing yourself with a 1/4" mesh that's more expensive... Or bad news that now I have totally inadequate fencing and will need to spend $$$ anyway. We're in MA and theoretically we do have fisher cats in the state, and they can probably fit through a 2" opening... And now I don't know what to do. Maybe the lesson here is that predator presence varies GREATLY not just from state to state, but within the same state, between counties, towns, who knows... maybe she doesn't have fisher cats on her street, but we do on ours...
and there's no way to know until you know.

So, I guess this could be good news or bad news. Good news that you can still have a "Fort Knox" even without killing yourself with a 1/4" mesh that's more expensive... Or bad news that now I have totally inadequate fencing and will need to spend $$$ anyway. We're in MA and theoretically we do have fisher cats in the state, and they can probably fit through a 2" opening... And now I don't know what to do. Maybe the lesson here is that predator presence varies GREATLY not just from state to state, but within the same state, between counties, towns, who knows... maybe she doesn't have fisher cats on her street, but we do on ours...
