I followed the directions like others told me in a previous post. Warmed the cave up and placed all the chicks inside and covered the entrance for probably 30-40 seconds. Now they all seem to have accepted the cave and are happy! I have one question though. Should I start with the setting on high or start low and watch them to find their comfort level? Most of the chicks are just 4 days old, but one of them is almost two weeks old.