Thanks for the sympathies, all. It really helps with the loss. Amazingly, I'd just taken some pictures of her yesterday morning before she died. It's a stark reminder about how quickly life can suddenly be snuffed out.
Good news and bad news - you guys were right about our girl who was hiding! Little Kiev was under the ramp apparently, which is the one place I didn't look for her. I was so glad when I heard her little cheeps!! She's traumatized, but alive.
Bad news - the hawk did come back again. When I got up this morning, I looked out the back and saw him in the exact spot where he'd feasted on our girl yesterday, looking for scraps. I grabbed our shepherd and ran out, hoping Maya would catch the jerkface. He casually glanced our way and lazily flapped into a tree not 20' away. There he sat, staring at us, not caring that Maya was going crazy around the base of the tree or that I was throwing rocks and sticks at him and MISSING. I came within a few inches of him and all he did was stare at me!! The nerve!! I even ran back in and got a slingshot and still missed!! I had no idea that my accuracy was zero with that thing. I think he finally got bored and flapped a little further into the forest, but he didn't leave-leave. I have no doubts that he's still nearby.
Our setup is actually pretty decent - it's a solid pine coop with a fully enclosed area that opens up to a 200' circumference roaming area surrounded by an electric fence. They can take shelter under the ramp, under the shed itself, in the coop, or in the run. Ironically, we think Chucky got nailed inside the run... from the puff of little black-and-tan feathers and down, it looks like the hawk swooped right in and grabbed her in there and tried to fly away with her, or Chucky ran out in a panic, and somehow got tangled in the bottom of the fence where there's almost no electric current, and that was that.
Now I have to figure out how to get rid of this insolent jerk before he gets another one of my girls, who will be remaining inside the enclosed run until further notice. Obviously the slingshot won't do it... I guess I have to get a little rifle?