I have 4 16 week golden comet pulletts. Last nite all went in the coop except one . she was laying by the food dish . I picked her up which is strange in itself, mine either run to you for food or away from you, but do not like to be picked up. I put her in the coop. Today, she did come out on her own but is still laying around or walking slow with her tail feathers pointed down. none of them have started to lay yet. any one have any ideas what could be wrong with her? and what I can do for her? She is drinking but not eating.