Has anyone else had incubated chicks hatch early? I did a test run on my Janoel 12 incubator and had all 7 of 8 eggs hatch on day 20. Now I'm doing my 2nd hatch with 20 eggs and one hatched at 10 am (so technically 18 1/2 day hatch since I put them in at 10 pm on 1/30/16) Is that abnormal? The 2 chicks are walking and seem fine, but I'm a little concerned if that's bad. My temp with the Janoel is very consistent and at 99.5 to 100 degrees always. Any thoughts?