2 of my BR girls and both my EE's have been free ranging with my cornish roo. The girls eggs are are dark and very difficult to candle. I would like to let one of my girls set on the eggs, have a broody BR right now. How can I tell if the eggs are fertile without candling them? Not sure the roo is getting his job done. I have only seen him attempt to cover the 2 BR, he tries that when he doesn't see us around. They act so different when we are outside with them, the girls don't want the roo around when were are outside. But when they don't know we are around, the don't pick on him, and I think I was able to catch a glimpse of a successful mating when I was watching them scratch around the back yard through the window.