read your post 6/14 backyard chickens reguarding hatching Marans (dark eggs) I had an issue with eggs from my own bcms hens and roo. that I had a question about. Set 15 dark eggs, 13 hatched, 1 was slow and died after a few hours. To weak I guess as it just seemed to lay quietly resting for some time. The 2 in question didn't pip after 22 days. I candled as best as you can and could see a small beak in the air sack. Left them for another day then then give up and cracked the shell on the air sack. Nothing to indicate a live chick, so opened them up and found a (seemed) fully formed chick dead.
These are my own eggs not shipped. I am using a 1588 incubator, Had it not been for the 3 loses I would have had a 100% hatch. After some research it seems the darker eggs have some trouble hatching in a incubator.
However I had 5 eggs from the same pairing under a hen and they all hatched successfully, so I guess mother hen must know when to help.
Also checked the site you suggested. very good info. thank you
Edited by hot wings - 4/7/15 at 9:28am