I do staggered hatches every year, and for months in a row, at that. I just had one finish, actually. I have not found that it seems to hurt hatch rates. Note that if you do it frequently, you should be careful to keep the incubator cleaned out. I stick the eggs in my other incubator for a few hours while I clean it with a bleach solution and let it air out. I don't jack my humidity up very high, though; 50% at most. I do get it higher for chicken eggs because I see more signs of drying out. Those I do move to a lockdown incubator at times. (I'm not sure that said lockdown incubator isn't killing the eggs, though. I think I need to replace it.)
What are people’s thoughts on holding back some extra eggs that don’t fit in the incubator and swapping them in for any clears found on day 3? Too early to determine clears? Would the prolonged hatch time be annoying?
Just toying around with some ideas. Not sure what the fertility will be given much of the flock, including the rooster, are young.
Thanks!