Well what I'm trying to do is, get my leghorn pullets breed to my leghorn roo. 2 out of the 6 hens were laying already. 10 days ago I put them with the roo in a seperate coop all togather with a light. And since they've been looked up together 2 more have started laying ,pretty sure the other 2 will be right behind, they are all the same age. So to be safe I should wait another 20 days before I start gathering their eggs to incubate?