hi there, new to ducks. I have 9 cayuga eggs in the incubator for my 2nd hatch of them...first hatch they pipped and hatched day 29...this 2nd hatch they have pipped and are rocking on day 21!!! Has this happened before to anyone?? I'm almost wondering if there was a mistake with the breeder and I got chicken eggs Incubation humidity has been 50-55%, temperature 36.6-37.3 C Help! Are they going to be ok?