Gettin ready for work this morning, I heard a very loud thud against one of my windows. I looked out a different window just in time to see a large shadow fly past. The only thing it could have been was a hawk. I shot outside to check on my chickens. They were all in defensive positions in a corner. Actually, two were hiding under an overhanging hay bale. All I can guess is that the hawk tried for a chicken breakfast, hit the netting, and then struggled back up and hit my window which nicely reflects blue sky. Apparently, it really works. In case anyone wants to know, I use the so-called "deer net" sold at Home Depot in 7'x100' rolls. I used it folded in half, zip tying the sections together.