I had explosion experience yesterday evening. I was in the run giving the hens some scratch and all of the sudden a coopers hawk appeared at about three feet above the ground from the side of the coop in which no one saw it coming. My hens exploded in every direction. SCARED ME HALF TO DEATH. Man their reactions to this thing was in a blink of an eye. Keep in mind all their heads where down feeding. I have several robins that stand outside the fence to be fed along with the hens (didn't know robins like seeds but they do in my area) so I am sure this is what he was after. He wasn't successful. He flew up into the oak tree and looked highly disappointed. And this my friends is why I have netting over my run.