How crowded can the incubator/hatcher be during hatching? If I leave the chicks inside for a day or so to dry them off and keep the humidity up, at some point they are crawling all over each other and struggling to find room. Is that ok? At what point will the crowded condition cause them to suffocate one of the pipping eggs or cause other problems? How do you weigh opening the incubator to remove spent shells and/or pull some of the earliest hatchers out to a brooder and create room versus keep it closed down and humid?