We have 4 chickens. The Austrailialorpe is 5 years old and has a great excuse for not laying. The other 3, not so much. We have had them since they were chicks. We went through a local farm instead of the Urban Farm Store, which I now think may have been our first mistake. The lady we bought them from said that 2 of them were Delawares and 1 a Light Sussex. The Sussex has been our only regular layer. But, I have had to put her in our basement as she was being pecked to death by the Delawares just 3 weeks ago.
I think the 'Delawares' may be a cross between a Delaware and a Light Sussex as they have some collar feathers that are black and our previous Delaware, that we know is purebred, did not. They all laid intermittently to start with. Then the Delawares just stopped. The only time that I have recently received eggs from them is when I dewormed them. Then the larger of the 2 laid one egg and the smaller one 3 eggs. Both have been over a month and 1/2 with no egg production.
My Sussie was molting and stopped producing then. The towards the end of her molt the 'mean girls' (Delawares) started pecking her until she has an exposed 3" diameter red patch on her back. So, I currently have her in my basement - smells not so good down there at the moment.