One more note. I remember asking about this a long time ago, but have not heard anything mentioned about it this time around: The hen. Why does the hen hatch in all conditions without added humidity? I was told it's because of the type of heat we have in our incubators. A hen does NOT provide hot, warm air BLOWING over her eggs. WIth a hen it's skin to skin contact.The hen's body regulates the loss of humidity. An egg has all the humidity it needs right inside itself to hatch properly, as long as you don't dehydrate it by blowing hot air over it. If I set an apple in my incubator for 21 days, I bet it would be a dehydrated apple by the end of 21 days..all that hot wind in there.
Humidity is an issue (in some cases) because we have mussed up the way eggs are incubated when we remove them from the hen. Tinker with nature and long debates about humidity will be your punishment :p
Very interesting how our diverse global locations affect everything about poultry from hatching to wether it's a black bear or wombat breaking into the hen house. Okay, I know wombats do not attack chickens, but you get my drift. I think this is such a neat site!
Joachim: I do not fear any animals breaking in. I just think this wall system is a failure at keeping heat in all winter and heat out all summer. Wish I could build again differently...in another life perhaps.