In January I had a hawk attack one of my Easter Eggers.  He attacked her, and then flew up in a tree right above her.  When I ran out the hawk flew away.  I took the chicken inside, but she ended up dying.  She didn't even look hurt, there was just some feathers around her.  I don't know if it was the shock or internal injures or a broken neck.  I don't know what the hawk would have done with her if I hadn't heard the commotion and run outside.  She was almost a year old, so she was full grown.  For the rest of the winter I was just very careful with my girls.  I think the hawk only went after her because it was really hungry and couldn't find anything else to eat.  It was the same size as my chicken.