If you are curious to see what roams your property, put up a game camera. I have several and have hundreds of pictures from them. especially coyote. I have electric wires around my coops and pens, concrete under the gates and good heavy duty netting covering all of the pens. Owls hunt at night and I have lost some birds to owls in addition to fox, coyote, possum, hawks, and bobcat. I haven't had any losses in quite awhile. Eventually your birds will be discovered. It's just a matter of time. It may not be this year or next, but eventually. These predators know the electric wires are there. Good luck and have fun...