GOOD NEWS UPDATE!!!
This morning, we found our three missing chicks emerging from UNDER the coop! They were chilly but alive! :-) Can't express how happy I am! Our coop is like Fort Knox, so when they are free- ranging, it kills me when I can't protect them. They mostly forage in the surrounding wooded areas and have lots of places to hide. I think this chick just didn't hear or see the hawk in time. Sad for hi,/her, but thankful the other 3 were not victims too!
Sorry about the loss, but glad the others found a place to hide!!!