I bought 6 eggs on ebay, received 9, 4 had broken air cells. I have them in the incubator, BUT I don't see anything resembling development in them. But how would I know? The chick-spot is usually what floats to the top and can then be seen through the shell....but with these eggs, the air bubble is always in the way. Of the other 5, 4 have movement now (day 6), one appears to have died, and I just can't tell with the 4 'bubble' eggs. How long before I give up hope on those? TIA!