Our flock is growing. By July, we'll have 35ish full sized birds that will include maybe 2 or 3 roos. They free range from around 9am until they put themselves away at night. We're in the mountains, on an acre, though they utilize more than just our land (lots of empty lots around). I read about people just doing measured feedings, especially when a flock is free ranged, but I've always kept the feed free choice. As our flock has grown from just a few birds, obviously feed costs are going up. I'd like to hear opinions on both methods from those of you who free range their chickens. Things are obviously different in the winter around here than in the summer, so I'd be happy to hear about both periods. Also, because we have a mixed age flock, we're feeding starter/grower and free choice oyster shell. They lay like crazy, but want to make sure that it's acceptable to feed like this and not layer (though I have no idea how I'd keep them apart).