just went in to check on the little serama chicks and the eggs in the incubator and noticed a tiny crack on one of the eggs, it's only day 15 way to early for it to hatch. what is going on, i have never had a chick trying to hatch this early before, what's the chances of this one surviving. when i candled the eggs on day 10 this one was more advanced then the other 3, i only have 4 that was fertile. it's definitely only day 15 as i keep a record. he's moving around like a good one, i have turned off the automatic turner and put up the humidity, i hope this will not harm the other 3 eggs. has this happened to anyone else.