I just responded to someone asking why their EE's arent laying. I have 5 EE's and 4 of the 5 are laying and they started at 18 weeks. Then my silver laced wyandotte started laying in her 20th week and also another one of my brown egg layer laid this week, her 20th week also.
I have one rooster, a silver laced wyandotte and then i have 19 girls. I give treats 2 to 3 times a day which consist of anything from, oatmeal, cereal, raisins, lettuce, grapes, bread, noodles, squash, strawberrys, corn on the cob out of the garden..things llike that. My husband brought home 2-50 lb bags of wheat seed after farming and they just love wheat seed, they get a scoop full each morning and evening of that.
They have an 8 x 10 coop that is open to an 8 x 22 run and each evening they are let out to free range from 2 ot 4 hours before bed time. Hope thats helps