G'Morning, I have 11 cuckoo maran eggs on day 23 in a Little Giant forced fan incubator. After not candling at all I decided to give it a go and see if I could see thru the dark shells. I could not see very well...and did not know if I was seeing movement or not on day 18. Let them alone and none never hatched. I gave up on the batch...but left them in the bator for one last ditch day. My DH and I went to bed last evening (the bator is in our room so we can monitor it during the night) and after turning the light out and almost falling asleep we hear a chirp. We both sit straight up in bed and run to the bator. I cannot see anything pipped thru the windows. My friend told me that you have to PIP the shell for cuckoo marans because they are a breed who has a tough time getting out of the shell? I did pick an egg and broke away the shell and it contained a dead chick developed to about day 14. So I gave up on the whole hatch...GLAD I didn't unplug the bator.