I let my 6 week old chicks outside everyday until it starts getting dark. I was gone and it started raining and getting really cold outside. They had a roof over the top of them so they weren't rained on, just cold. They probably should be starting to go outside full time now but its been storming at night the past few days so I'm gonna wait a bit. I went to go get them to bring them inside and four of them were just fine but one of them stood there with her feathers puffed up as if she were cold. I thought she would be okay once she got warmed up but 5 hours later still puffed up and not eating or drinking. She shivers, too. Should she be feeling better tomorrow? Thanks.