Today is day 10 with 10 speckled Sussex eggs in our small incubator. The eggs are all laid on their sides, and there is a circular dish in the center of the incubator with some water in It. Each egg has its fat, rounded end at the center and the pointier end at the wall of the incubator. We candied on day 7. I noticed a “nucleus” floating (and moving around) on 8/10 eggs. The other two did not have a nucleus, or “dark shadows,” like the rest, and they let MUCH more light through & the consistency inside the egg appeared more watery and fluid. We assumed these two are infertile but they remain in the incubator still. Today, we candles (day 10) and 2 show no signs of change, and 8/10 still show “nucleus” and show actual movement! (What is the moving around? Is this the embryo floating or the chick actually moving?) Since the eggs lay on their side, I guess the air pockets all formed lengthwise on each egg, so 50% looks like air and 50% looks like a dark shadow. Please note the added picture— as shown, the light side seems like air. The room is dark and the only light is coming from the candler. The lighter side of the egg stays in place as I turn the egg around, and the darker side does as well. Thanks in advance for all help!