I have 2 thermostats here I did not figure out how to connect, having a few things to do, but I was hatching now since I was home for winter bookkeeping, and this last batch has had the occasional SHORT spike when the house got really warm, and occasionally got down to 97 air temp, but I have 4 quart jars full of water under the chicks platform to slow temp swings and I think it helped.
of 12, 7 have hatched. I didn't candle until a couple of days ago, the one white egg looks like just a yolk floating around in there, the other white egg a very small chick that didn't make it early I think. I have 3 brown eggs I can't see through. About to water candle, but I don't hear any clicking in there, so I think they didn't make it or possibly were not even fertile. 5 black chicks, 2 yellow - americauna mix chicks.