Hi, I'm new to BYC and I have question about one of my hens. I have six red sex-links and for a while now I'v only been getting five eggs (which isn't normal for them). Over the past few days one of the hens has been ruffling her feathers and staying away from the other chickens. Just today she was standing in the run (looking more ruffled than ever) when she suddenly dropped a shell less egg. She's still eating and drink and oyster shells are always available. I've done some research but I'm still not sure what's going on. Thanks in advance to any help.