Either candling brown eggs is quite hard, or it takes practice. I'm not sure which, but that was stressful! Anyway, good news! I just candled my very first batch of eggs, it is currently day 5 and 15 of 17 eggs are showing some level of development! The other two may or may not be developing - I really just couldn't see anything because they were so dark. It didn't help that I was using a giant maglite to try to candle them and balancing that in one hand while trying to turn the egg with the other was not as easy as I originally thought it would be. I think I must have a really good Roo. The girls follow him everywhere, he is never mean to them and apparently he manages to get just about every single egg they lay to be fertile.