I have not gone through all the replies here, so you may have your answer already, but I'll add my two cents. I'm in my first year of raising chickens and I KNOW there are hawks around here. I got standard sized chickens which I thought would be too big for Cooper's hawks (turns out I was wrong, but here they seem to prefer the mourning doves). We started out by putting a lot of flagging up strung from the coop to the surrounding trees. You want to break up a direct flight path from the trees to the ground. We also made a couple of platforms from 2 x 4's that we covered with pine boughs so the chickens have a place to hide. They love them and hang out there during the day for shade and cover. I also got a rooster (which I wasn't planning on) to help warn the flock and he does his job well. I use electronetting to enclose my chickens and I've run it through a few wooded brushy corners of the yard, again for cover. They have a small run through which they have to go to get into the coop and I keep the door of the run propped open just enough to allow the chickens to pass through. A hawk could follow, but it wouldn't have a straight shot. We also had turkey vultures roost in the woods this year and I think they may have deterred the hawks somehow, but I have not seen a single hawk all summer and have had no chicken losses so far. Good luck!
