Chickens Arent' laying!! Could my coop be the problem??

[Iwanteggs4]

HELP!! My chickens are 36 weeks old and still no eggs! I have two Rhode Island Red's and one black chicken. I have had them since about 6-8 weeks old and they have been together the whole time. I'm feeding them Layerina food, they get oyster shells, about two weeks ago we added a light in the coop so they now have light from 6a-8:30p. Can someone please tell me if there is something else I need to do? I'm about to just throw up my hands with these chickens.

 

[Hokum Coco]

If they are heritage breed chickens you just have to be more patient they are not quite as proficent layers as Sex Link birds but they are a better dual purpose bird. Trade offs always have to be made with a heritage breed. Sounds to me like you are doing all you can do.