My year old Biff Orpington hen was just struck by a large hawk (pretty large from what I saw, maybe two and a half feet?) and I'm worried it might come back. It was a gruesome death, and I don't want my other flock members to suffer the same demise. Should I keep them inside? It's been two days, and it hasn't returned, but I don't know if it's nesting nearby or something. What should I do?