My week old chicks became very lethargic today. They were previously very active and now have been sleeping in a pile all day while making quiet shrieking sounds. They are not showing the usual interest in food and seem to only occasionally be drinking water. This morning they were fine. I fed them a snack of flax seeds and ground up pumpkin seeds and at that point were very excited. Their poops are possibly a little more runny than usual. They seem very sick. Help.