My chickens look up and crunch down real low when they see a bird flying overhead. Most chickens have a strong urge to hide or freeze when they see flying predators. My father has wellsummers and they all take off for the nearest bush when they see them. As long as there is bushes and places for them to hide, they will probably be ok. But every once in a while you might lose one.
That's the constant battle. Do you deprive your babies of ever having the luxury of free-ranging so that everyone is safe all the time or do you let them live a little and maybe one will take one for the team
It's completely up to you. Just so you know, it will most likely be your roo cause they stand out and will protect your flock. Good news, your hens will be fertile for another three + weeks so you can incubate a new roo.
I keep mine in the run and when Im outside messing around or evenings (hawks usually attack in the morning) I let them out. My rosecombs are out 24/7. They are like wild jungle fowl. They are fast, agile, and blend in well with the shrubery.
My columbian cochins, however, have a target on their back.
and aren't so agile
Here's a pic of my cart coop with a run we built that fits up against it. I pull it back apart to move the cart, then drag it to where we moved it. It's own weight holds it against the coop so we don't have to worry about dogs getting in or cluckers getting out.