My 6 girls are now around 26 weeks old, we have been collecting a few eggs from them since week 18! we now get 4-5 eggs per day and the occasional 6th too. We also have a recent addition of an 8 month old black Ameraucana rooster. I was concerned about them sleeping in their nesting boxes when they had started laying. They developed a liking for sleeping on the side edges of the nest boxes at night which then left poop in the actual nest boxes....not much fun collecting poop covered eggs! we decided to make some adjustments to the layout of the sleeping and nesting quarters and now we have our girls sleeping all over the coop! The rooster sleeps in the bottom nest box. 3 girls sleep on the ledge under the roost perches, 1 sleeps on the floor of the coop and 2 sleep on the roost perches we provided after modification. Now we get our clean eggs from the non-poopy nest boxes! Adding some nice hay into the new nest boxes encouraged our girls to lay in there instead of in the old nest box positions. hopefully this info will help someone else out there in coop land!