We used to let our chickens free range our large fenced in back yard. It wasnt predetors or them running away that was the issue. It was how destructive they were. And poop everywhere even on the deck. Lost some bushes and mums due to their digging and they always kicked dirt all over the sidewalk.
So. We ran a fence down about 1/3 of the yard . they have their yard and we have ours. They have so much room they rarely try to get on our side. We put pullets in the coop at 5 weeks. They stayed in their for a few weeks then we ley them into a little fenced area adjacent to the coop for a week or so and now at 10 weeks they are out in the big yard with the others.
So. We ran a fence down about 1/3 of the yard . they have their yard and we have ours. They have so much room they rarely try to get on our side. We put pullets in the coop at 5 weeks. They stayed in their for a few weeks then we ley them into a little fenced area adjacent to the coop for a week or so and now at 10 weeks they are out in the big yard with the others.