Last month, I lost one of my favorite hens, Annie, to a hawk here in VA. And many are right, he was IN the smaller enclosre in that has a roof and was under the coop eating my poor hen!! I was so mad, that I stood there a moment crying till I realized my husband had yelled hawk, I turned and this huge red tail was flying around inside. Once we got it out it flew up into a tree right by our enclosure and sat there watching, didn't matter I was throwing rocks and a stick at it. My husband wanted to shoot him and as much as I wanted to say make him a puff of feathers, he was only doing what nature intended so he shot near it.
I have found, throwing peanuts out for the crows, they have been great about keeping many of the hawks away from our farm. I do carry a bb gun with me when I go out to check the chickens in the afternoon and have shot at a few.