Are they the plastic eggs, like for kids? I tried ne of those at first but my girls didn't seem to like the box with that one in it. The other one had a nice brown, realistic ceramic egg in it that my grandmother had found at a thrift shop. Their first choice was that nest. I have ceramic eggs in both now. Also even 21 weeks isn't overdue yet, but hopefully soon! Has it been hot in Nevada? Heat can affect laying. Good luck!Mine are 16 - 21 weeks old and nothing...........I even but some fake easter eggs in the nest box and they drug them out and tossed them out of the chicken door. sigh![]()