Mine come out at dawn and go back in at dark. We're on 10 acres but have lots more open acreage all around us, several mile sections. I have seen hawks in the area and worry about them but since my flock is primarily for eggs, I don't fret as much as I would if they were my cherished pets. I leave them out all day, whether I leave and go to town or to the city or whatever. When I'm gone for a weekend or so, I have a 'pet sitter' who comes in and feeds and waters the horses, chickens, dogs and cats. In winter, I pay her to sleep over so the dogs can come in and sleep in the house. I know, I know, SPOILED! Anyway, so their routine remains the same whether I'm home or not.