I have four chickens. They are now 8 weeks old and have been in their enclosure with hen house for about 2 weeks. One of my easter eggers is not as peppy today. She kind of looks at the food but is not really eating. She's still with the others, but not as fast. She also keeps her head tucked in and not at the usual curious long looking around angle. I'm totally clueless and hope someone knows something to help me out!