I have pastured my birds too but not anymore due to the losses. I do have large pens. I have electric wire around the coops and pens and heavy duty netting covering the pens. Several years ago I had a coyote jump over a 5' fence into a smaller pen it jumped back out and so did some of the birds. It did kill some of the birds. I got a shot at it but had bird shot in my gun. I pretty sure I hit it but of course didn't kill it. I have my pens covered with heavy duty netting to protect the birds from aerial predators. I caught this one the night before last.