We were going to let the girls accumulate their eggs in the hope that one of them would become broody and sit on them- it didn't work. We got up to 17 eggs in the dog crate we put in the henhouse and they weren't really committed to sitting yet, but several of them were in there at various times. Just not consistantly. Then last night we went out to count eggs and we only had 15 marked, two new, and egg yolk all over the eggs So one of them, instead of brooding the eggs, is EATING them! I think today the experiment stops, and I see if it is too late to order chicks from Agway...
Many hens never go broody in their entire life. Hatchery hens have had the broodiness bred out of them in exchange for a higher egg laying percentage.