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Quote: It's forced air. Both thermometers said 99-100. The humidity was dry for the first 18 days then between 60 and 77 when the first hatched. I have a qfg digital hydrometer. I don't know what happened. The chicks that hatched are big and healthy. I forgot to mention that 15 were shipped eggs. I let them set for 3 days, all had nice air cells and growing well.
Mich you did dry hatch? meaning what? You need to use humidity to reach the necessary weight loss in the egg, too dry and they cant turn, too wet and they drown. Dry hatch doesn't imply no water in the bator, it means you use it as a tool to keep weight loss on target, sometimes you need more sometimes less depending on your room conditions etc. Do you think your chicks were stuck? It sounds to me like you ran dry dry and lossed too much. also did you weigh them throughout? (I don't but some do)