My broody/mama is part of my free range flock (I have two,) and I turn her and her chicks loose when they hatch.
I let them free range -- but she doesn't! She keeps them close to the coop, or between the coop and the house, or at the edge of the lawn (read, mowed weeds/grass between house and field/trees.) They're about 3 weeks now. She's gradually been taking them further from the coop. The others go off in the woods or wherever (they could leave the county if they wanted.) They gather together at times during the day, esp. at treat time.
I have 4 dogs and a cat, who I guess you could also say free range, but they do not leave our property. The cat is afraid of the chickens, though she teases them a little. The dogs ignore them, but chase off fox, coon, other dogs, etc. They also hunt and eat rats, mice and moles.