I have four chickens, and at about 5 months old my husband removed the divider that kept their nesting boxes closed off. My Ameraucana literally jumped up to the box as we were standing there and sat right on down in that box! We closed the lid and left her alone not knowing what that meant exactly (but were hopeful!). Two hours later we checked and there was a beautiful green egg laying there! This was the first of the whole group that laid an egg and we were thrilled. Two days later the rest started laying and ever since then (January 3) the Ameraucana has not laid another egg. She seems fine. Doesn't appear to have any heath issues. I have seen her lay in the nesting box a few times but not much. We get three a day, none of them green. Any suggestions? Is it possible that her egg has changed color? We have kept a lamp in the coop so they get plenty of light (and warmth) in their younger months.