I have some 12 cuckoo maran eggs in the incubator. They are on day 7, I candeled them today and I dont see any signs of anything, but the yolk. I also have 18 silkie eggs in the incubator and 17 of them have baby chicks in them moving, they are due to hatch in 3 more days. Should I be worried about the marans? Are they ruined or maybe not fertile? I picked them up from a local breeder, and they were all laid that day I put them in the bator. I have read that on day 7 I should be able to see at least a dark eye. I am soo upset that these eggs are no good. The temps have held steady at 100.5 and the humidity around 50% What else could I do, what are some signs of bad eggs. How can you tell if they are fertile?