I wanted to post an update on my 4 fertile eggs. I have learned that they are hybrid-hybrid (black sex-link hen and a golden comet rooster) so mutts, really. They will just be pets and I have no rooster so no intention of continuing any sort of breeding lineage with them. I'm sure any professional breeders reading this are cringing right now. But I am very curious to see what color chicks come out of these eggs.
Today is day 20 and all 4 eggs are doing well. I know you're not supposed to open the incubator at all, but I've got them in a room where I'm able to control the temperature and humidity separately from the rest of the house and is kept warm and humid. None of the eggs have externally pipped yet. 2 have pipped into their air cell and 2 have yet to do so, but all 4 are alive and moving. This is my first experience hatching chicken eggs and I'm getting very excited.
I know not to count them before the hatch, but I will post another update in a few days.