I've had my chicks for three days now. We moved them from a tiny box to a larger box last night. When I checked on them this morning they were all sleeping at the same time. I woke them when I changed the water. Now they are alseep again. They are in small bunches, along the walls. The temp is about 90 degrees. They have a red heat lamp on them. Is is normal to sleep all at the same time?