It really depends on a lot of factors. I split mine up and put them in the rack in shoebox tubs even before shedding once all of them are out of the egg completely. If you have a large enough incubator, and it's at 88 or less, you could probably leave them in there as long as you provide a water dish and switch to a tub with air holes. I wouldn't do it at 90, or with a small incubator because then you have to open it often to give them fresh air and it's going to mess up temps for your other clutches.