Both.
We have a 26' enclosed fenced run with the coop inside. To protect them from predators both on the ground & the sky. We are planning on adding a second fence around that's electric. Doing all we can to keep them safe. We have everything from Bears, bobcats, coyotes, coons, foxes, hawks, owls etc... You name it, we live in a rural area with tons of predators.
Once they are full grown. My plan is to allow them to free range the entire property, but ONLY if I am out there with them. I may be paranoid, but I will do everything in my power to protect them.