Danz so will the turkeys drown during the 3 day lock down humidity up to 50% for the chicks to hatch? Or will they be ok?
No they won't, but I never hatch at over 40% if I can help it.
HEChicken I hatch at lower humidities all the time. Never over 40% for chickens or turkeys. You get better hatches and less sticky chicks that way. I used to hatch at much higher levels that I had read about and my hatch rate was considerably lower. Now with fertile eggs I get pretty much a 100% hatch. This varies however if I have different breeds in the incubator. The small breeds tend to hatch much earlier and a couple of the larger breeds hatch on day 22. I have a continuous hatch going all the time with eggs at different stages. Keeping the humidity higher made the chicks grow too large for their shells and thus they didn't hatch as well. I'm sure it makes a difference with staggered hatches and such but even those rare times when all the birds are due at once they do better at lower rates. The amount of air flow makes a difference as well. I've found that out using more than one kind of incubator.
Dani has an old metal incubator and those things are a whole 'nother ball game. I had one for a while that I gave away but there is really not a good way to keep humidity constant or keep temperature level all over.