I have some Welsummer eggs in my incubator. I can't see a thing yet through them. (But it's only Day 5) When I compare this to my other eggs, they are easy to see through. Saw what looked like some veins starting today in one of them. It got me wondering if I'll be able to see anything, even later in incubation?(probably not a good idea for 1st time hatching, but I REALLY wanted them) So do you candle dark eggs? If you do, when do you candle them and what do you look for?