You don't want that chick fluff in your incubator. It will start to coat the motor parts and fan. It's not easy to clean out. I found that out the hard way. Better to hatch in a separate one.Thats what I thought about having 2. But I thought maybe I am missing something. lol I saw Dickeys makes them to incubate and hatch in together. So I thought maybe I was missing something. I am knew at this.