Our brooder was in our coop (just a horse stall we enclosed with fencing material), so at 3 wks old (last week), I tipped the brooder(water trough) on it's side. The heat lamp is still there for them, but they have the run of the 12' stall, and are loving it. This week, I opened the stall door during the day (fencing over opening), so they get fresh air, sunlight, and some interaction with the horses that they will be free ranging with later. Next week, I hope to let them into a small fenced in area in paddock, for even more exposure to surroundings and horses (but no direct contact yet). In think gradual exposure is less stressful.