If they get cold, they can move to a warmer area and vice versa. As the chicks age, their metabolism catches up and they become warm-blooded, i.e., able to maintain body temperature. This change takes several weeks. It is important to help this process along by reducing supplemental heat gradually. Avoid abrupt changes.
Many growers believe inside pens with outside runs are required for proper growth in ratite chicks.
This system allows protection from inclement weather as well as outside access for exercise, which may promote good leg formation and strength. Some growers brood chicks inside for only a few days before placing them outside with supplemental heat for cool nights. Ratites usually are brooded on solid flooring, although wire-floored brooding areas also can be used. If using wire floors, take care to avoid drafts and to ensure that the birds' legs do not become stuck in the wire. Half-inch wire probably is sufficient.