During the week, we let ours out when we come home at the end of the day and let them range until they put themselves in at dusk. On the weekends, if we are around, we'll let them out earlier. If we're going out, we just leave them in the coop or if they're out we lure them back in. We don't have any dogs around and our cats leave the chickens alone (though one likes to watch them, she's been pecked and won't mess with them.) There is a hawk around, but so far so good, we have a lot of trees on our lot and the chickens seem to stick to the wooded areas. Our only problems with predators so far have been at night, not while the girls are free ranging during the day.