Brought home 6 baby chicks 2 days ago. Five are doing really well but one shakes/shivers a lot (usually when she is awake; it does not seem to happen when she is asleep -- or, at least, doesn't happen as often). Do not believe she is cold, as she does not stay directly under the heat lamp; also all the other chicks seem happy with the temperature. She seems to be doing fine otherwise -- eating, drinking, behaving similarly to the other five. Any ideas about what could be going on? THANK YOU!