My Barred Rocks Hens (2) refuse to perch to sleep in the main part of their coop. Instead they like to cram themselves into their nest box and sleep in what resembles a chicken "ball" - - legs, wings feathers all mixed up together. Is this normal? They never perch. I thought I read that if the hens start sleeping in their nesting box they will not lay eggs there. Our coop is pretty small, and that is the only option we have for nesting. We have tried to shut off the nesting area so they get used to sleeping in the coop area, but as soon as we open the nesting box back up they go and sleep in there. Any suggestions? Is this even a big deal? They are about 21 weeks old and we are awaiting the arrival of eggs any day now. Could this be some sort of weird egg laying behavior? Thanks for any input!