A large area around the brooders is warmed to the same temperature with whole house. The chicks have no choice between warm and cool areas. Partial-house brooding is much like whole house brooding, because the total brooding area is warmed. To save energy, however, the brooding area is reduced to the minimum amount needed for the size of chicks. As the chicks grow, the brooding area is increased in accordance to their sizes.
Good ventilation is essential with all brooding systems, but especially partial-house brooding.
Under most circumstances, method number one is the easiest and most effective method for raising chicks. A few days prior to receiving chicks, a brooding area should be established. Corrugated cardboard makes an excellent brooder guard and can be discarded when it becomes soiled. Mesh material allows for greater airflow during the summer months. Circular boundaries minimize huddling and loss due to suffocation.