Are you absolutely sure, without doubt, these are hawks? It's not common for hawks to hang out in groups. Could they be turkey buzzards or some other bird of prey? In any case, as you mentioned, hawks are protected and (unless the current admin has also removed protections from hawks as it has from so many other endangered critters) you could get yourself in a world of hurt for hurting them. You seem to know this, but those suggesting shooting them don't. Although I wonder if it would be helpful to shoot off (4th of July) fireworks to scare them as long as you didn't aim the fireworks at the birds? I have mine cooped up till about eleven every day because of hawks and birds of prey hunting early. I hear them go screeching by in the morning, stupidly screeching out that they are hungry hawks. I learned that they eventually pass on through and that it's safe to let the chickens out in late morning. They have all their food and water and room to run/peck inside, so it's not a problem. My husband built the chicken yard fence so that it's shaped oddly like a triangle rather than a rectangle, and it makes it a bit harder to land in there. A mesh netting across the top may help, along with slanted fencing at the very top. Some people use electric fencing (I don't), but I think that's more for 4-legged predators. Good luck, and I feel your pain. It's a heart-wrenching hobby and I may be giving it up soon due to raccoons and opossums myself. --m