We had a Hawk get in our coop this weekend. Hubby went out to feed the chickens and heard a commotion by the time he got there our female cochin was dead and the others were hiding in their coop. We still aren't sure how it got in but there was a gap around the door that I have been concerned with so I am thinking that may have been the entry point. I thought it was too small to be a problem but it was a small Hawk so I am not sure. We just opened the door and he flew out. He didn't even get to eat what he killed, maybe that will make him think it isn't worth the effort of trying again. I am glad that it wasn't our favorite chicken Honeybun, it is terrible to lose any but we would all be devastated if we lost her. We have now reinforced everything.
I am sorry for your lost chicken.