Hi, I have about two dozen girls that are a little over 6 months old. A few started laying at about 3 1/2 months, most have been laying for a couple months now. My 14 brown egg layers average 12 eggs a day. My four ameraucanas are laying 2-3 eggs a day. I have 5 brown leg horns that up until a week ago were averaging 3 eggs a day but now for a week - NOT ONE EGG! They are all getting supplemental light as they all live together. They do get out occasionally and 1 or 2 of them are laying in an outside nest they have created. I have searched my entire property and have found none of their eggs anywhere?? Any thoughts?