I have 11 BCM eggs and 8 Barred Rocks. They are all shipped eggs from the same supplier in the same package. The BR have done as I would have guessed, with my very limited knowledge. The BR that I couldn't see veins on the day of Lockdown, have not done anything, but all the others have pipped and one has already hatched. Today is the end of Day 21 (counting from the day after the evening I put them in the 'bator). My BCM's have done almost nothing. One pipped out a large piece of shell 8 hours ago and doesn't seem to be able to get beyond this point. I did help it slightly by opening the membrane just a little after 4-5 hours of no progress. There was a tiny amount of blood, as all I did was try to open the membrane a little more. I did not try to crack the shell or do anything that dramatic. It is still breathing, moving and chirping but isn't getting anywhere. The little bit of blood I saw at the time (that made me stop) seemed limited to the membrane and does not appear to be an ongoing issue. My concern is that all of my other (10) BCM eggs have done nothing. They are dark so I couldn't see well when I candled. However, on the day of lockdown, I could see at least 5 had good veins. Most of the others had good air cells and large black areas but I couldn't see well through the shell so I am not sure if they had veins or not. The shell of the first one is so thick that I am worried that they just aren't really strong enough to break through. If the Barred Rocks had done poorly, I would assume it was my incubating technique but this seems limited to the BCM's. Do they take longer? At what point, if any, should I do anything.