Found a bunch of feathers in the chicken field, rushed to the coop to find one rather shaken-up chicken. She is missing feathers, and seems to have been pecked on her back - back and tail feathers are the ones that were pulled out. No blood - no open wounds. SO... our first thought was a hawk, but I'd suspect they'd be more successful. We have a nesting group of vultures that sometimes roost on the fence, or in the chicken field. Has anyone heard of a vulture attacking a live chicken?