I've got a dozen Black Copper Maran eggs in the bator. It's day 7 so i candled them. i've hatched eggs in a bator many times before but not these dark Maran eggs. I did purchase these from a breeder and they were shipped USPS. Even through the seller is in the same state as myself i'm a little worried the eggs may have been shaken too much during shipping. i candeled them all before setting and had no visable cracks or damage. it does appear there is a dark area inside the egg but i cannot tell if its the yolk or if there is more??? Any suggestions would help.