We have a small borrowed styrofoam one... I think I would have done a much better job not intervening if I had one with more room. Once our hatchlings started standing up they were bumping their little heads into the heating element so I ended up moving them to the brooder. I'm concerned that moving them (opening the incubator) is why my other eggs are having trouble. So my question is for those who leave the hatchlings in with the other eggs... What kind of incubator do you use?