I have a black sex link and Delaware hens. They were both laying and now it just light a light switch they both stopped. Nothing has changed except we do have 4 new hens and I let them out in intervals. The new hens have been here for 5 weeks but I am afraid to let them out together yet because the others have stopped laying. Could it be that they quit because of the new hens ? Oh I also have 2 younger ones EE mixed and they are still laying I am not sure of the age of the 2 older girls maybe 3 years or more.