Get as many old CDs as you can find and hang them in various places around the coop or wherever the chickens run. Sometimes use one
sometimes string two or more together. You can decorate them further with pieces of glittery ribbon and we add feathers to ours to make them spin more. The theory is that they disorient the hawks and/ or that they think they are fire. We move ours around in different places every day or so too. You can actually buy glittery stuff to deter hawks but this is cheaper and fun to make your own. Not exactly attractive but who cares they do help a lot. I have also read that you can string fishing line or wire across the top of the coop Personally I think that might cause other problems you don't want, like the hawk getting caught in there...remember that it is illegal to kill them and anyway, they only see dinner, you can't really blame them for preying on the chickens. You can also use wind spinners and we have used wind spinners and added cd's to them sometimes too. Anything that flashes and spins. The worst time of year for predation by hawks is in the late summer and fall when more abundant prey begins to thin out, and some hawks do migrate so they might only temporarily be in your area. But of course, it's best to watch out for them all year long. Roosters help too, they automatically know to watch out for the hawks, and they will sound an alarm to the flock.