I think the OP is going free-range route and raptors can't be targeted there either.In my youth I kept 100 roosters in individual pens and 200 or more free range hens on 6 or 7 acres. It was a different world then and if the game warden was a friend he would stop by and tell you that there was a hawk sitting on the power line down the road. You just had to give him enough time to get out of hearing before you went after it.
When the minimum wage was 40¢ -75¢ an hour a live possum fetched $2.00 and a few years later when the minimum was $2,00 or so, prime red fox pelts sold for 70 bucks and prime coon skins had advanced to $8 - $25. In other words it was more dangerous being a predator than it was to be a chicken. I would have spazed out with a 10% adult loss rate. However l culled and culled and culled some more. Mopey or sleepy looking chicks didn't see the next sunset.