Most likely at some point in the future your birds will probably be discovered by predators. Predator proofing is my number 1. I would put an apron around your coop and pen to discourage diggers. Eventually the grass will grow up through it so you will be able to mow over the wire. I do use chicken wires but as I mentioned previously I also have electric wires around my coops and pens. Once a predator comes in contact with the hot wires they don't test them again. I do have in some areas with chicken wire and welded wire.