I candled some of my eggs again today. 3/4 of the eggs from my 2 newly laying pullets are fertile and developing. Those 3 will be an interesting surprise! Both of the pullets are mixed breed and I'm not sure which of the young boys is actually mating with them. I have a 5 month old easter egger, a 5 month old silkie (who's half the size of the girls!), and an almost 4 month old australorp that matured very quickly. The other 4 month old boys aren't showing much interest in the girls yet. I added 3 eggs from 2 bantams that I got a few days ago. I'm not sure which hen laid them and I have no idea what they would be mixed with if they are actually fertile. So far, I'm not seeing any development in those, but it's still early. The rest of my eggs (wyandottes, australorps, and olive eggers) appear to be growing and thriving. They have one week to go! I need to get started on a new brooder that will hold all of these chicks!