I have 5 duck eggs in my incubator at the moment. 2 seem to have grown faster than the other and seem to be completely filling the egg, you can just make out movement need the edge of the air sack and see a little veining. On of them the air sack has started to slant. They are on day 20 of incubation starting tomorrow (3rd) I'm wondering if I should stop turning the 2 filled eggs before the 25th day or keep turning them until lock down time? There is movement in all 5 eggs and some nice veining visible in the 3 that haven't grown as fast as the darker two.