Our flock has grown into a much larger version of what it was supposed to be initially (shocking, I know) and they've now learned that they can roam the entire neighborhood since most of our neighbors adore them. So the issue now is that they wander over probably 5 acres, only one of which belongs to us, and I have to put a stop to it. I've got roughly 800' of fence to install to keep the chickens on our property and was thinking of going with a 6' tall fencing but with our sandy soil I'd have to run 10' posts so I can get 4' of them in the ground. We've done some looking and are just about settled on a 4' tall fence with two strands of barbed wire at the 4.5' and 5' mark. This will allow the deer to still come in the yard with little effort, keep out most large (dog) predators and hopefully keep the chickens within their boundaries. Will the fence described above keep the birds in? They are ranging all over primarily because all the neighbors have green grass and since our place is brand new and the land hasn't been cleared yet we have none.